BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Neutrino Self-Interactions: Solar and Astrophysical Constraints DTSTART;VALUE=DATE-TIME:20250919T103500Z DTEND;VALUE=DATE-TIME:20250919T105500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-494@indico.ift.uam-csic.es DESCRIPTION:Speakers: Saeid Foroughi-Abari ()\nTesting new interactions in the neutrino sector\, both in current and upcoming experiments\, is essen tial for uncovering the nature of neutrinos. In many extensions of the Sta ndard Model (SM)\, active neutrinos may engage in self-interactions via th e exchange of a new light particle\, often motivated by the need to explai n empirical puzzles such as the origin of neutrino mass. Cosmological data also point toward an effective Fermi constant significantly larger than w hat the SM offers. Much of the parameter space for sizable neutrino self-i nteractions (nuSI) mediated by a light neutrinophilic scalar has already b een tightly constrained by complementary terrestrial\, astrophysical\, and cosmological probes. In this talk\, I demonstrate how precise measurement s of the solar neutrino flux by BOREXINO can be used to place new constrai nts on nuSI. In addition\, I present a novel approach in which nuSI are me diated by a field with a continuous spectral density. I demonstrate that a gapped unparticle mediator can open up significant regions of parameter s pace for strong nuSI relevant to cosmology\, providing a well-motivated ta rget for upcoming experiments.\n\nhttps://indico.ift.uam-csic.es/event/29/ contributions/494/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/494/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome slides DTSTART;VALUE=DATE-TIME:20250916T121500Z DTEND;VALUE=DATE-TIME:20250916T122500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-513@indico.ift.uam-csic.es DESCRIPTION:Speakers: Pilar Coloma ()\nhttps://indico.ift.uam-csic.es/even t/29/contributions/513/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/513/ END:VEVENT BEGIN:VEVENT SUMMARY:PADME results on X17 searches (15'+5') DTSTART;VALUE=DATE-TIME:20250917T093500Z DTEND;VALUE=DATE-TIME:20250917T095500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-450@indico.ift.uam-csic.es DESCRIPTION:Speakers: Mario Antonelli (INFN)\nThe PADME experiment at the Frascati National Laboratory of INFN has performed a\n search for the hyp othetical X17 particle\, by observing the product of the collisions\n of the positron beam from the DAΦNE LINAC on a diamond fixed target.\n The beam energy has been varied in the range\n 265–300 MeV\, corresponding to values of √s between 16.4 and 17.5 MeV\,\n completely covering the t he CoM region identified by the\n ATOMKI collaboration as significant for observing the postulated X17 particle.\n The result of the analysis show s an about 2-sigma excess corresponding to the mass indicated by \n the A TOMKI experiment. A new data taking campaign\, with an improved detector i s\n planned to start in the summer of 2025\, with the aim of pushing forw ard the \n sensitivity of the search.\n\nhttps://indico.ift.uam-csic.es/e vent/29/contributions/450/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/450/ END:VEVENT BEGIN:VEVENT SUMMARY:A Search for Dark Sectors Using Lasers DTSTART;VALUE=DATE-TIME:20250916T155300Z DTEND;VALUE=DATE-TIME:20250916T155400Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-497@indico.ift.uam-csic.es DESCRIPTION:Speakers: Silvia Lucia Correa Angel (Federal University of Rio Grande do Norte -UFRN\, International Institute of Physics - IIP)\nThe da rk photon is a new gauge boson that naturally arises in many beyond the St andard Model theoretical models\, featuring\ninteractions that resemble qu antum electrodynamics. Due to this feature\, it is often considered the po rtal between dark and visible\nsectors. For this reason\, it has become th e target of many experimental searches worldwide. In this work\, we propos e a search for dark\nphotons based on the Inverse Compton scattering\, $\\ gamma e^- \\rightarrow A^\\prime e^-$\, to be conducted at the Brazilian\n Synchrotron Light Laboratory (LNLS). In this setup\, photons from a laser source would impinge on the accelerated electron beam\npresent at the LNLS \, producing a dark photon in the final state. Taking advantage of the pho ton counting technique\, we derive the\nprojected sensitivity of this prop osed dark sector detector by considering the energy of the incident photon about 1 eV and an electron\nbeam of 3 GeV. We show that this experimental setup could pave the way to the first Latin-American Dark Sector detector capable of\ncovering an unexplored region of parameter space and confirmi ng results from previous searches via astrophysical sources\, thus\nconsti tuting a promising probe for dark sectors in the future.\n\nhttps://indico .ift.uam-csic.es/event/29/contributions/497/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/497/ END:VEVENT BEGIN:VEVENT SUMMARY:New benchmarks for direct detection of freeze-in dark matter DTSTART;VALUE=DATE-TIME:20250916T155400Z DTEND;VALUE=DATE-TIME:20250916T155500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-496@indico.ift.uam-csic.es DESCRIPTION:Speakers: Rafael Lopez Noe (IFT UAM-CSIC)\nIn this work\, we a pply recent direct detection constraints on electron recoils to freeze-in Dark Matter (DM) models. Due to recent results obtained by direct detectio n experiments\, especially DAMIC-M\, the dark photon scenario is severely constrained. However\, there are different scenarios in which these bounds can be avoided. In freeze-in models\, the scaling of the DM relic abundan ce allows the dark photon to be a subdominant component. DAMIC-M results r ules out up to 50 %\, with future experiments aiming to constraint up to 0 .001 %. Next\, we show that in scenarios where the main DM production chan nels are not electron-positron or plasmon decay\, such as Lμ − Lτ \, t he main contributions comes from ν\, that are now charged to the Z′. Th us\, such models avoid the current direct detection constraints on electro n recoils.\nAs a result\, we provide new targets for upcoming direct detec tion experiments looking for electron recoils such as DAMIC\, SuperCDMS or Oscura.\n\nhttps://indico.ift.uam-csic.es/event/29/contributions/496/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/496/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Matter in an Evanescent Three-Brane Randall-Sundrum Scenario DTSTART;VALUE=DATE-TIME:20250916T155500Z DTEND;VALUE=DATE-TIME:20250916T155600Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-469@indico.ift.uam-csic.es DESCRIPTION:Speakers: Alejandro Muñoz Ovalle (IFIC (CSIC/UV))\nApart from its gravitational interactions\, dark matter (DM) has remained so\nfar el usive in laboratory searches. One possible explanation is that the relevan t interactions\nto explain its relic abundance are mainly gravitational. I n this work we consider an extra-\ndimensional Randall-Sundrum scenario wi th a TeV-PeV IR brane\, where the Standard\nModel is located\, and a GeV-T eV deep IR (DIR) one\, where the DM lies. When the\ncurvatures of the bulk to the left and right of the IR brane are very similar\, the tension\nof the IR brane is significantly smaller than that of the other two branes\, and therefore\nwe term it “evanescent”. In this setup\, the relic abun dance of DM arises from the freeze-\nout mechanism\, thanks to DM annihila tions into radions and gravitons. Focusing on a\nscalar singlet DM candida te\, we compute and apply current and future constraints from\ndirect\, in direct and collider-based searches. Our findings demonstrate the viability of this\nscenario and highlight its potential testability in upcoming exp eriments. We also discuss\nthe possibility of inferring the number of bran es if the radion and several Kaluza-Klein\ngraviton resonances are detecte d at a future collider.\n\nhttps://indico.ift.uam-csic.es/event/29/contrib utions/469/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/469/ END:VEVENT BEGIN:VEVENT SUMMARY:A Monte Carlo approach for simulating photon-ALP interconversion a t gamma-ray energies in astrophysical environments DTSTART;VALUE=DATE-TIME:20250916T155200Z DTEND;VALUE=DATE-TIME:20250916T155300Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-464@indico.ift.uam-csic.es DESCRIPTION:Speakers: Gaetano Di Marco (IFT UAM/CSIC)\nAxion-like particle s (ALPs)\, theoretical extension of the QCD axion\, are some of the numero us candidates for constituting dark matter. Several theoretical and experi mental efforts aim to probe and constrain their properties\, namely mass a nd potential coupling to standard model particles. Among these\, assuming coupling with photons\, the low-mass ALPs range\, viz. m_{ALP} \n\nhttps:/ /indico.ift.uam-csic.es/event/29/contributions/464/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/464/ END:VEVENT BEGIN:VEVENT SUMMARY:Heavy neutral lepton searches in cosmic ray beam dump experiments DTSTART;VALUE=DATE-TIME:20250916T155000Z DTEND;VALUE=DATE-TIME:20250916T155100Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-472@indico.ift.uam-csic.es DESCRIPTION:Speakers: Baibhab Pattnaik (Instituto de Física Corpuscular ( Universidad de Valencia-CSIC))\nWe demonstrate the possibility of testing Heavy Neutral Leptons (HNLs) using "cosmic ray beam-dumps'' : setups where high-energy incident cosmic rays impinge on the Earth's atmosphere and th en on the Earth's surface. We focus on HNL production from atmospherically produced parent meson decays\, and examine them as a possible explanation of the appearing Cherenkov showers observed by the SHALON Cherenkov teles cope and the ultra-high energy events detected by the ANITA neutrino exper iment. Further\, we propose two new experimental setups with improved sens itivities\, namely a Cherenkov telescope pointing at a sub-horizontal angl e and shielded by the mountain cliff at Mt. Thor\, and SPYGLASS: a geostat ionary satellite that observes part of the Sahara desert. Our results show that that the Mt. Thor experiment can probe currently untested HNL parame ter space below the kaon mass\; while SPYGLASS can significantly increase the HNL parameter space coverage in the mass range from 10 MeV up to 2 GeV and test neutrino mixing $|U_{\\alpha4}|^2$ down to $10^{-11}$ for masses around 300 MeV.\n\nhttps://indico.ift.uam-csic.es/event/29/contributions/ 472/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/472/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrinos from Dark Matter scatterings around blazars DTSTART;VALUE=DATE-TIME:20250916T154900Z DTEND;VALUE=DATE-TIME:20250916T155000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-471@indico.ift.uam-csic.es DESCRIPTION:Speakers: Jacopo Nava (U. Bologna)\nNeutrinos from blazars can originate from inelastic scatterings between the protons within their jet s and sub-GeV dark matter (DM) around them. I will show how this mechanism can potentially account for both the IceCube detections of neutrinos from the blazar TXS 0506+056\, that are\notherwise challenging for astrophysic al models of its jet\, and also saturate the measured diffuse astrophysica l neutrino flux at high energies\nThe same DM-proton interactions will als o induce an upscattered DM flux\, which could yield measurable nuclear rec oil signals at neutrino detectors\, such as Super-K\, JUNO and DUNE. I wil l show that searches for such DM component leave room for a variety of DM models to explain observations of IceCube high-energy neutrinos\, and will provide future tests of this hypothesis.\n\nhttps://indico.ift.uam-csic.e s/event/29/contributions/471/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/471/ END:VEVENT BEGIN:VEVENT SUMMARY:Ceilings from the Floor: Constraining light mediators with solar n eutrino scattering DTSTART;VALUE=DATE-TIME:20250916T154800Z DTEND;VALUE=DATE-TIME:20250916T154900Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-463@indico.ift.uam-csic.es DESCRIPTION:Speakers: Pablo Blanco (IFT UAM/CSIC)\nThe recent observations of solar $\\rm ^8B$ neutrinos via coherent elastic neutrino–nucleus sca ttering (CEνNS) by the PANDAX-4T and XENONnT collaborations mark the firs t detection of the so-called “neutrino fog” — an irreducible backgro und for future direct dark matter searches. In this talk\, I will show how these results enable powerful new probes of light mediators coupling to n eutrinos and quarks. Using the new available datasets from PANDAX-4T and X ENONnT\, we derive leading constraints on sub-GeV scalar and vector mediat ors\, including scenarios with flavor-universal or mass-proportional quark couplings. \n\nI will also discuss the impact of subdominant neutrino int eraction channels — such as neutrino–electron scattering and the Migda l effect — and demonstrate that\, while typically neglected\, they can c ontribute non-negligibly in S2-only analyses. These results highlight the potential of next-generation liquid xenon detectors not only for dark matt er discovery\, but also as sensitive laboratories for light new physics in the neutrino sector.\n\nhttps://indico.ift.uam-csic.es/event/29/contribut ions/463/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/463/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraining eV-scale axion-like particle dark matter: insights f rom the M87 Galaxy DTSTART;VALUE=DATE-TIME:20250916T154700Z DTEND;VALUE=DATE-TIME:20250916T154800Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-466@indico.ift.uam-csic.es DESCRIPTION:Speakers: Pratick Sarkar (Indian Association for the Cultivati on of Science)\nAxion-like particles (ALPs) can account for the observed d ark matter (DM) of the Universe and if their masses are at the eV scale\, they can decay into \ninfrared\, optical and ultraviolet photons \n{with a decay lifetime larger than the age of the Universe}. \nWe analyze multi-w avelength data obtained from the central region of Messier 87 (M87) galaxy \nby several telescopes\, such as\, Swift\, Astrosat\, Kanata\, Spitzer a nd \nInternational Ultraviolet Explorer \nin the infrared to ultraviolet f requencies \n($\\sim 2\\times10^{14} \\\, {\\rm Hz} - 3\\times10^{15}$ Hz) \, \nto constrain the narrow emission lines indicative of the eV scale ALP DM decay. \nWe derive constraints on the ALP coupling to two photons ($g_ {a\\gamma\\gamma}$) for ALP mass range $2 \\\, {\\rm eV} \n\nhttps://indic o.ift.uam-csic.es/event/29/contributions/466/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/466/ END:VEVENT BEGIN:VEVENT SUMMARY:New probes of supernovae axion-like particles in neutrino water Ch erenkov detectors DTSTART;VALUE=DATE-TIME:20250916T154600Z DTEND;VALUE=DATE-TIME:20250916T154700Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-461@indico.ift.uam-csic.es DESCRIPTION:Speakers: David Alonso-González (IFT (UAM-CSIC))\nIn this tal k I will present a new potential signature of supernovae axion-like partic les (ALPs) in neutrino water Cherenkov detectors. If ALPs couple to proto ns\, then they can be detected through ALP absorption on free protons\, $a \\ p→p\\ γ$\, where the resulting photon has approximately the energy o f the ALP. This new signature is complementary to the usual one from oxyge n de-excitation\, and can be exploited in various ways.\n\nI will first ar gue that ALPs with MeV masses can be produced with semi-relativistic veloc ities in core-collapse galactic supernovae and that they can constitute a diffuse flux formed by the overlap of the ALP fluxes. Using Super-Kamiokan de data\, new constraints on the ALP-proton coupling can be derived in reg ions that cooling bounds cannot probe. For lighter ALPs\, the conditions f or a diffuse flux fail. Nevertheless\, they can still be looked for on ind ividual (future) neighbouring supernovae. I will show that this new signat ure\, combined with the one expected from oxygen de-excitation\, would all ow us to disentangle ALP-neutron and ALP-proton couplings.\n\nhttps://indi co.ift.uam-csic.es/event/29/contributions/461/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/461/ END:VEVENT BEGIN:VEVENT SUMMARY:Inelastic Dark Matter at ProtoDUNE DTSTART;VALUE=DATE-TIME:20250916T134500Z DTEND;VALUE=DATE-TIME:20250916T140500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-452@indico.ift.uam-csic.es DESCRIPTION:Speakers: Sara Bianco (DESY Hamburg)\nLiquid argon Time Projec tion Chambers (LArTPCs) have proven to be powerful instruments for detecti ng weakly interacting particles predicted by many beyond the Standard Mode l (BSM) scenarios. Thanks to their location at CERN\, the ProtoDUNE detect ors can intercept a sizeable flux of such particles\, produced when the 40 0 GeV protons from the Super Proton Synchrotron (SPS) impinge on a fixed target. In this talk\, I will focus on the inelastic dark matter (iDM) mo del and search for its dark photon mediator in ProtoDUNE. I will outline t he projected sensitivity reach for its mixing parameter\, $\\varepsilon$\, and its mass\, $m_{A'}$.\n\nhttps://indico.ift.uam-csic.es/event/29/contr ibutions/452/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/452/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview: rich dark sectors and non-minimal HNL models DTSTART;VALUE=DATE-TIME:20250916T143500Z DTEND;VALUE=DATE-TIME:20250916T150500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-473@indico.ift.uam-csic.es DESCRIPTION:Speakers: Silvia Pascoli (Bologna University)\nhttps://indico. ift.uam-csic.es/event/29/contributions/473/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/473/ END:VEVENT BEGIN:VEVENT SUMMARY:DM in celestial bodies DTSTART;VALUE=DATE-TIME:20250919T101000Z DTEND;VALUE=DATE-TIME:20250919T103500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-493@indico.ift.uam-csic.es DESCRIPTION:Speakers: Sandra Robles (Fermilab)\nhttps://indico.ift.uam-csi c.es/event/29/contributions/493/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/493/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for axions and DM using indirect detection DTSTART;VALUE=DATE-TIME:20250919T094000Z DTEND;VALUE=DATE-TIME:20250919T101000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-467@indico.ift.uam-csic.es DESCRIPTION:Speakers: Elena Pinetti (Flatiron Institute)\nInvited talk (ov erview)\n\nhttps://indico.ift.uam-csic.es/event/29/contributions/467/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/467/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraints on ultralight scalars from compact stars DTSTART;VALUE=DATE-TIME:20250919T085000Z DTEND;VALUE=DATE-TIME:20250919T091000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-454@indico.ift.uam-csic.es DESCRIPTION:Speakers: Tanmay Kumar Poddar ()\nUltralight scalar fields tha t interact with Standard Model particles through electromagnetic and elect rophilic couplings can be efficiently sourced by compact stars\, leading t o the emergence of long-range forces within binary systems. In certain reg imes\, these scalars may also be emitted from the stars\, giving rise to d istinctive observational signatures. In this talk\, I will present constra ints on such scalar fields derived from a variety of astrophysical observa bles\, including pulsar spin-down rates\, orbital period decay in binaries \, gravitational redshift measurements\, and key timing data from objects such as the Crab pulsar\, PSR J0737–3039\, SGR 1806–20\, and GRB 08090 5A. I will further examine how interactions with the cosmic neutrino backg round can attenuate these effects\, potentially relaxing the resulting bou nds. Finally\, I will highlight how future radio surveys and precision ast rophysical measurements could significantly tighten current limits\, enhan cing our sensitivity to new light degrees of freedom.\n\nhttps://indico.if t.uam-csic.es/event/29/contributions/454/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/454/ END:VEVENT BEGIN:VEVENT SUMMARY:Axion dark matter from heavy quarks DTSTART;VALUE=DATE-TIME:20250919T083000Z DTEND;VALUE=DATE-TIME:20250919T085000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-446@indico.ift.uam-csic.es DESCRIPTION:Speakers: Mohammad Aghaie Moghadam Ozbak (University of Pisa a nd INFN Pisa)\nAxions and axion-like particles (ALPs) remain compelling da rk matter (DM) candidates\, provided that the associated Peccei-Quinn (PQ) symmetry breaking scale is sufficiently large to ensure cosmological stab ility. In this talk\, I will explore a novel framework in which ALPs posse ss flavor-violating (FV) couplings to Standard Model (SM) quarks\, allowin g them to be produced via freeze-in in the early universe. I will demonst rate that rare meson decays\, such as $K \\rightarrow \\pi a \\quad \\text {and} \\quad B \\rightarrow K a\,$ allow us to probe decay constants as hi gh as $f_a \\sim 10^{10{-}12}~\\mathrm{GeV}.$ Remarkably\, this parameter space is typically thought to be inaccessible to terrestrial experiments. The structure of FV couplings opens up opportunities to test otherwise elu sive ALP scenarios\, while remaining consistent with astrophysical and cos mological constraints. I will highlight key differences between the lepton and quark FV scenarios\, particularly in their sensitivity to decay versu s scattering production channels\, the degree of suppression required to e vade X-ray constraints\, and the relevance of next-to-leading order (NLO) corrections. Altogether\, this framework connects the flavor and dark matt er frontiers\, offering a new avenue to search for light dark matter candi dates through precision flavor experiments and future X-ray telescopes.\n\ nhttps://indico.ift.uam-csic.es/event/29/contributions/446/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/446/ END:VEVENT BEGIN:VEVENT SUMMARY:Phenomenology of axion and axion-like particles DTSTART;VALUE=DATE-TIME:20250919T080000Z DTEND;VALUE=DATE-TIME:20250919T083000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-492@indico.ift.uam-csic.es DESCRIPTION:Speakers: Javier Redondo ()\nhttps://indico.ift.uam-csic.es/ev ent/29/contributions/492/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/492/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for Dark Sectors at the Kaon experiments (NA62\, KOTO) DTSTART;VALUE=DATE-TIME:20250918T152500Z DTEND;VALUE=DATE-TIME:20250918T155000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-491@indico.ift.uam-csic.es DESCRIPTION:Speakers: Evgueni Goudzovski ()\nhttps://indico.ift.uam-csic.e s/event/29/contributions/491/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/491/ END:VEVENT BEGIN:VEVENT SUMMARY:FIP/LLP searches at NA62 DTSTART;VALUE=DATE-TIME:20250918T150000Z DTEND;VALUE=DATE-TIME:20250918T152500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-490@indico.ift.uam-csic.es DESCRIPTION:Speakers: Jan Jerhot ()\nhttps://indico.ift.uam-csic.es/event/ 29/contributions/490/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/490/ END:VEVENT BEGIN:VEVENT SUMMARY:Millicharged particles DTSTART;VALUE=DATE-TIME:20250918T143000Z DTEND;VALUE=DATE-TIME:20250918T150000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-489@indico.ift.uam-csic.es DESCRIPTION:Speakers: Yu-Dai Tsai ()\nhttps://indico.ift.uam-csic.es/event /29/contributions/489/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/489/ END:VEVENT BEGIN:VEVENT SUMMARY:Scattering meets absorption in dark matter detection DTSTART;VALUE=DATE-TIME:20250918T132000Z DTEND;VALUE=DATE-TIME:20250918T134000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-453@indico.ift.uam-csic.es DESCRIPTION:Speakers: Anh Vu Phan (Radboud University\; Nikhef)\nWe explor e the interplay between dark matter scattering and solar dark photon absor ption in two dark matter models with light dark photon mediators. Sub-keV dark photons\, abundantly produced in the solar core\, provide complementa ry detection channels to scattering of dark matter from the halo. Incorpor ating astrophysical and cosmological constraints—including dark matter s elf-interactions and solar cooling —we identify the viable parameter spa ce for both Dirac and atomic dark matter. For Dirac dark matter\, simultan eous detection of scattering and dark photon absorption is possible at dir ect detection experiments in the near future. In the atomic dark matter ca se\, an interesting interplay of signals from dark atoms\, their ionized c onstituents\, and solar dark photons could be observed. To disentangle the se signals\, the measurement of energy recoil spectra is essential. Combin ing the detected signals could help to distinguish between different dark matter models.\n\nhttps://indico.ift.uam-csic.es/event/29/contributions/45 3/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/453/ END:VEVENT BEGIN:VEVENT SUMMARY:The Dawn of Nuclear Supremacy: First Bounds on Ultralight Dark Mat ter from the Thorium Isomer Transition DTSTART;VALUE=DATE-TIME:20250918T130000Z DTEND;VALUE=DATE-TIME:20250918T132000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-457@indico.ift.uam-csic.es DESCRIPTION:Speakers: Eric Madge (IFT-UAM/CSIC)\nThe recent laser excitati on of the low-lying Th-229 isomer transition is starting a revolution in u ltralight dark matter searches. The enhanced sensitivity of this transitio n to the large class of dark matter models dominantly coupling to quarks a nd gluons will ultimately allow us to probe coupling strengths eight order s of magnitude smaller than the current bounds from optical atomic clocks\ , which are mainly sensitive to dark matter couplings to electrons and pho tons. We argue that\, with increasing precision\, observations of the Th-2 29 excitation spectrum will soon give world-leading constraints. Using dat a from the pioneering laser excitation of Th-229 by Tiedau et al. [Phys. R ev. Lett. 132\, 182501 (2024)]\, we present a first dark matter search in the excitation spectrum. While the exclusion limits of our detailed study of the lineshape are still below the sensitivity of currently operating cl ock experiments\, we project the measurement of Zhang et al. [Phys. Rev. L ett. 133\, 013201 (2024)] to surpass it.\n\nhttps://indico.ift.uam-csic.es /event/29/contributions/457/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/457/ END:VEVENT BEGIN:VEVENT SUMMARY:New approaches in light DM detection DTSTART;VALUE=DATE-TIME:20250918T123000Z DTEND;VALUE=DATE-TIME:20250918T130000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-488@indico.ift.uam-csic.es DESCRIPTION:Speakers: Christina Gao ()\nhttps://indico.ift.uam-csic.es/eve nt/29/contributions/488/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/488/ END:VEVENT BEGIN:VEVENT SUMMARY:Inelastic DM constraints and viable scenarios DTSTART;VALUE=DATE-TIME:20250918T100500Z DTEND;VALUE=DATE-TIME:20250918T103000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-487@indico.ift.uam-csic.es DESCRIPTION:Speakers: Renata Zukanovich Funchal ()\nhttps://indico.ift.uam -csic.es/event/29/contributions/487/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/487/ END:VEVENT BEGIN:VEVENT SUMMARY:New results of DAMIC-M DTSTART;VALUE=DATE-TIME:20250918T094000Z DTEND;VALUE=DATE-TIME:20250918T100500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-486@indico.ift.uam-csic.es DESCRIPTION:Speakers: Sravan Munagavalasa ()\nhttps://indico.ift.uam-csic. es/event/29/contributions/486/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/486/ END:VEVENT BEGIN:VEVENT SUMMARY:Light DM detection in neutrino experiments DTSTART;VALUE=DATE-TIME:20250918T091000Z DTEND;VALUE=DATE-TIME:20250918T094000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-485@indico.ift.uam-csic.es DESCRIPTION:Speakers: Jong-Chul Park (Chungnam National University)\nhttps ://indico.ift.uam-csic.es/event/29/contributions/485/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/485/ END:VEVENT BEGIN:VEVENT SUMMARY:From ANAIS-112 to ANAIS+: eight years of dark matter search at the Canfranc Underground Laboratory DTSTART;VALUE=DATE-TIME:20250918T082000Z DTEND;VALUE=DATE-TIME:20250918T084000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-449@indico.ift.uam-csic.es DESCRIPTION:Speakers: Iván Coarasa Casas (CAPA - Universidad de Zaragoza) \nThe ANAIS-112 experiment has completed nearly eight years of continuous data taking\, aiming to test the annual modulation signal reported by the DAMA/LIBRA collaboration\, using the same NaI(Tl) target and detection tec hnique. Located at the Canfranc Underground Laboratory\, ANAIS-112 has acc umulated over 800 kg·yr of exposure\, achieving excellent long-term stabi lity and background control. In this talk\, I will present the six-year re sults from ANAIS-112\, which lead the international\, model-independent ef fort to test the DAMA/LIBRA signal\, and are compatible with the absence o f modulation and incompatible with DAMA/LIBRA for a sensitivity above 4σ\ , with the potential to reach 5σ level by the end of 2025. Systematics af fecting the comparison will also be reviewed\, particularly those related to the response of detectors to nuclear recoils. \n\nBeyond ANAIS-112\, th e ANAIS+ project proposes a significant technological upgrade: the replace ment of conventional PMTs with SiPMs operated at low temperatures. This in novation is expected to reduce radioactive backgrounds\, lower the energy threshold\, and improve light collection efficiency -thereby increasing th e experiment’s sensitivity to low-mass dark matter. Furthermore\, it wil l allow for a more robust and systematics-independent comparison with DAMA /LIBRA\, while opening new opportunities for searches of spin-dependent in teractions and coherent elastic neutrino-nucleus scattering.\n\nhttps://in dico.ift.uam-csic.es/event/29/contributions/449/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/449/ END:VEVENT BEGIN:VEVENT SUMMARY:Sub-GeV Thermal Relics Enabled by a Light Higgs Portal DTSTART;VALUE=DATE-TIME:20250918T080000Z DTEND;VALUE=DATE-TIME:20250918T082000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-468@indico.ift.uam-csic.es DESCRIPTION:Speakers: Vishnu Padmanabhan Kovilakam (Institute of Theoretic al Physics\, University of Münster)\nIn this talk\, I will discuss minima l realizations of light thermal dark matter (DM) candidates. These scenari os typically require a light mediator to ensure sufficient DM annihilation rates. We demonstrate that such mediators can arise from additional Higgs doublet(s). Within this framework\, we focus on two specific scenarios: ( 1) Forbidden DM\, where DM predominantly annihilates into SM charged lepto ns through kinematically forbidden channels\, and (2) Neutrinophilic DM\, where neutrinos serve as the primary annihilation products. In both cases\ , all BSM states lie at or below electroweak scale\, making these models t estable at upcoming colliders\, beam-dump experiments\, future sub-GeV gam ma-ray telescopes\, and next-generation neutrino detectors.\n\nhttps://ind ico.ift.uam-csic.es/event/29/contributions/468/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/468/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct detection of light dark matter DTSTART;VALUE=DATE-TIME:20250918T073000Z DTEND;VALUE=DATE-TIME:20250918T080000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-484@indico.ift.uam-csic.es DESCRIPTION:Speakers: Kimberly Palladino ()\nhttps://indico.ift.uam-csic.e s/event/29/contributions/484/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/484/ END:VEVENT BEGIN:VEVENT SUMMARY:The CMZ anomalous Ionization rate explained by MeV DM DTSTART;VALUE=DATE-TIME:20250917T152500Z DTEND;VALUE=DATE-TIME:20250917T155000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-448@indico.ift.uam-csic.es DESCRIPTION:Speakers: Pedro De la Torre Luque (Universidad Autónoma de Ma drid & Institute of theoretical physics (IFT-UAM))\nRecent observations of a variety of ionization tracers have revealed an unexpectedly high ioniza tion rate in the Central Molecular Zone (CMZ)\, that cannot be explained b y ionization of cosmic rays. The current observations point to a source of particles that is very concentrated around the Galactic Center and should emit low energy ionizing particles (to avoid propagating too far away fro m the CMZ). In this talk\, I'll show that the anomalous ionization rate ob served in the CMZ can be attributed to MeV dark matter annihilation for ga lactic dark matter profiles with slopes γ > 1 and that the low annihilati on cross-sections required avoid (by a few orders of magnitude) the curren t cosmological constraints and imply no detectable inverse Compton\, brems strahlung or synchrotron emissions in radio\, X and gamma rays.\nMoreover\ , I'll discuss the possible common origin of this anomaly with the puzzlin g 511 keV line emission in the Galactic Center\n\nhttps://indico.ift.uam-c sic.es/event/29/contributions/448/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/448/ END:VEVENT BEGIN:VEVENT SUMMARY:Core-collapse supernova explosions hindered by eV-mass sterile neu trinos DTSTART;VALUE=DATE-TIME:20250917T150000Z DTEND;VALUE=DATE-TIME:20250917T152500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-440@indico.ift.uam-csic.es DESCRIPTION:Speakers: Kanji Mori (National Astronomical Observatory of Jap an)\nLight sterile neutrinos\, $\\nu_s$\, are often introduced to explain an anomalous deficit in the electron antineutrino flux from nuclear reacto rs. If they exist\, sterile neutrinos would also be produced in collapsing massive stars through the active-sterile neutrino oscillation. In order t o investigate the impacts of sterile neutrinos on supernova dynamics\, we perform two-dimensional neutrino-radiation hydrodynamic simulations of ste llar core-collapse coupled with the active-sterile oscillation through the Mikheyev–Smirnov–Wolfenstein effect. As the initial condition of our simulations\, we adopt a blue supergiant model that is tuned to reproduc e observational features of the SN 1987A progenitor to compare our models with observations of the event. It is found that the active-sterile oscill ation reduces the $\\nu_{e}$ and $\\bar{\\nu}_e$ fluxes and decreases the explosion energy. We also find that\, if the mixing angle $\\theta$ and th e mass difference $\\delta m_\\mathrm{s}^2$ between $\\nu_e$ and $\\nu_s$ are large enough\, the star fails to explode. This suggests that these mix ing parameters relevant to sterile neutrinos could be constrained by super nova explodability\, though other uncertainties in supernova theory need t o be addressed to refine them. In addition\, we predict neutrino signals f rom a nearby supernova event and find that the neutrino event number can s ignificantly decrease because the $\\nu_e$ and $\\bar{\\nu}_e$ fluxes are reduced. In particular\, DUNE observations of $\\nu_e$ will be useful to s earch for a signature of sterile neutrinos with a tiny mixing angle becaus e a smaller mixing angle leads to a larger effect on the $\\nu_e$ flux.\n\ nhttps://indico.ift.uam-csic.es/event/29/contributions/440/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/440/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of astrophysical constraints on light dark sectors DTSTART;VALUE=DATE-TIME:20250917T143000Z DTEND;VALUE=DATE-TIME:20250917T150000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-483@indico.ift.uam-csic.es DESCRIPTION:Speakers: Seokhoon Yun ()\nhttps://indico.ift.uam-csic.es/even t/29/contributions/483/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/483/ END:VEVENT BEGIN:VEVENT SUMMARY:Phasing-in dark matter DTSTART;VALUE=DATE-TIME:20250917T134000Z DTEND;VALUE=DATE-TIME:20250917T140000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-442@indico.ift.uam-csic.es DESCRIPTION:Speakers: Henda Mansour (Karlsruhe Institute of Technology)\nD espite being an elegant mechanism to explain Dark Matter (DM) production\, freeze-in introduces challenges: If DM interacts via non-renormalizable o perators\, the predictions are highly sensitive to initial conditions\, su ch as the reheating temperature of the universe. These issues are particul arly relevant in models in which the universe deviates from radiation domi nation and the entropy of the Standard Model (SM) thermal bath is not cons erved. \nIn this talk\, I will present a general freeze-in scenario in whi ch a scalar field dominates the energy density of the universe before unde rgoing a first-order phase transition and then slowly decaying to visible particles. The decays lead to a second phase of reheating of the radiation bath and to additional contributions to DM freeze-in. I will explore the conditions under which these late contributions dominate over the initial DM abundance produced at primordial reheating. In this scenario\, referred to as phase-in\, the final abundance of DM is primarily determined by the details of the phase transition and subsequent reheating\, and insensitiv e to the details of inflationary reheating. \nAdditionally\, I will revisi t the commonly made assumption that the universe becomes early matter domi nated after such a phase transition\, discuss scenarios in which this may break down and highlight its relevance to the phase-in mechanism.\n\nhttps ://indico.ift.uam-csic.es/event/29/contributions/442/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/442/ END:VEVENT BEGIN:VEVENT SUMMARY:New approach for study of dynamics of neutrinos in the primordial era DTSTART;VALUE=DATE-TIME:20250917T132000Z DTEND;VALUE=DATE-TIME:20250917T134000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-443@indico.ift.uam-csic.es DESCRIPTION:Speakers: Vsevolod Syvolap (Instituto de Física Teórica)\nCo smological observations\, such as Big Bang Nucleosynthesis (BBN) and the C osmic Microwave Background (CMB)\, provide vital insights into the early U niverse\, allowing us to trace its evolution to times as short as $t \\sim 0.01$ s and to test extensions of the Standard Model. Accurately modeling the non-trivial dynamics of neutrinos typically requires solving a system of Boltzmann equations numerically\, a method that comes with inherent li mitations\, particularly in terms of computational efficiency. In this tal k\, a novel approach based on the Direct Simulation Monte Carlo (DSMC) met hod is presented\, which offers significant advantages over traditional te chniques\, particularly in scenarios involving high-energy neutrino inject ions.\n\nhttps://indico.ift.uam-csic.es/event/29/contributions/443/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/443/ END:VEVENT BEGIN:VEVENT SUMMARY:Detecting Ultralight Dark Matter with Matter Effect DTSTART;VALUE=DATE-TIME:20250917T130000Z DTEND;VALUE=DATE-TIME:20250917T132000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-444@indico.ift.uam-csic.es DESCRIPTION:Speakers: Xucheng Gan (DESY)\nUltralight particles\, with a ma ss below the electronvolt scale\, exhibit wave-like behavior and have aris en as a compelling dark matter candidate. A particularly intriguing subcla ss is scalar dark matter\, which induces variations in fundamental physica l constants. However\, detecting such particles becomes highly challenging in the mass range above $10^{-6}\\\,\\text{eV}$\, as traditional experime nts face severe limitations in response time. In contrast\, the matter eff ect becomes significant in a vast and unexplored parameter space. These ef fects include (i) a force arising from scattering between ordinary matter and the dark matter wind and (ii) a fifth force between ordinary matter in duced by the dark matter background. Using the repulsive quadratic scalar- photon interaction as a case study\, we develop a unified framework based on quantum mechanical scattering theory to systematically investigate thes e phenomena across both perturbative and non-perturbative regimes. Our app roach not only reproduces prior results obtained through other methodologi es but also covers novel regimes with nontrivial features\, such as decohe rence effects\, screening effects\, and their combinations. In particular\ , we highlight one finding related to both scattering and background-induc ed forces: the descreening effect observed in the non-perturbative region with large incident momentum\, which alleviates the decoherence suppressio n. Furthermore\, we discuss current and proposed experiments\, including i nverse-square-law tests\, equivalence principle tests\, and deep-space acc eleration measurements. Notably\, we go beyond the spherical approximation and revisit the MICROSCOPE constraint on the background-induced force in the large-momentum regime\, where the decoherence and screening effects in terplay. The ultraviolet models realizing the quadratic scalar-photon inte raction are also discussed.\n\nhttps://indico.ift.uam-csic.es/event/29/con tributions/444/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/444/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of recent results from cosmological observations and impl ications for particle physics DTSTART;VALUE=DATE-TIME:20250917T123000Z DTEND;VALUE=DATE-TIME:20250917T130000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-482@indico.ift.uam-csic.es DESCRIPTION:Speakers: Eleonora Di Valentino ()\nhttps://indico.ift.uam-cs ic.es/event/29/contributions/482/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/482/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring the Light Dark World with NA64 (15'+5') DTSTART;VALUE=DATE-TIME:20250917T102000Z DTEND;VALUE=DATE-TIME:20250917T104000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-441@indico.ift.uam-csic.es DESCRIPTION:Speakers: Víctor Martín Lozano (IFIC/UV)\nIn the last years\ , the efforts towards finding subGeV new physics have increased. This Ligh t Dark World is vast and unknown\, however\, we know that the components o f different theories must live in that world. From the experimental side\, there is also a great effort to disentangle and understand what could hid e the Light Dark World. NA64 is a fixed target experiment at CERN SPS that search for the inhabitants of the Light Dark World using high energy elec tron\, positron and muon beams. In this talk\, we will focus on how NA64 i s able to shed some light in several corners of this dark sector with the latest results on muon beam data. First of all\, we will use the recent mu on data to constraint for the first time the SMEFT operators that involve muon flavour. Following with EFT\, we contrast the $\\nu$SMEFT operators t hat relates muon flavour with heavy neutral leptons. And finally\, we will see how muon data can tell us more about subGeV inelastic dark matter.\n\ nhttps://indico.ift.uam-csic.es/event/29/contributions/441/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/441/ END:VEVENT BEGIN:VEVENT SUMMARY:Latest results from NA64 (20'+5') DTSTART;VALUE=DATE-TIME:20250917T095500Z DTEND;VALUE=DATE-TIME:20250917T102000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-481@indico.ift.uam-csic.es DESCRIPTION:Speakers: Paolo Crivelli ()\nhttps://indico.ift.uam-csic.es/e vent/29/contributions/481/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/481/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of the X17 anomaly (20'+ 5') DTSTART;VALUE=DATE-TIME:20250917T091000Z DTEND;VALUE=DATE-TIME:20250917T093500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-480@indico.ift.uam-csic.es DESCRIPTION:Speakers: Luc Darmé ()\nhttps://indico.ift.uam-csic.es/event/ 29/contributions/480/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/480/ END:VEVENT BEGIN:VEVENT SUMMARY:Single pion production from interactions with dark matter DTSTART;VALUE=DATE-TIME:20250917T082000Z DTEND;VALUE=DATE-TIME:20250917T084000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-451@indico.ift.uam-csic.es DESCRIPTION:Speakers: Jaime Hoefken Zink (Narodowe Centrum Badań Jądrowy ch (NCBJ))\nWe present a comprehensive theoretical framework describing si ngle pion resonant production through inelastic dark fermion–nucleon int eractions mediated by resonances in the GeV-scale regime. Building upon th e Rein–Sehgal approach\, we derive differential cross sections for proce sses in which an incoming dark fermion scatters off a nucleon\, exciting a resonance that subsequently decays into a nucleon and a pion. Our formula tion accommodates various mediator types—namely\, dark photons with vect or and axial couplings\, as well as scalar and pseudoscalar mediators—th ereby extending the conventional approach that Rein\, Sehgal and Berger pe rformed for neutrino interactions. Transition amplitudes for the nucleon-t o-resonance conversion are computed using the relativistic harmonic-oscill ator quark model from Feynman\, Kislinger and Ravndal\, while a Breit–Wi gner prescription is employed to incorporate finite resonance widths. This framework offers a useful tool for interpreting experimental data in dark sector and dark matter searches and represents a contribution to elucidat e the possible role of resonances in GeV-scale phenomenology.\n\nhttps://i ndico.ift.uam-csic.es/event/29/contributions/451/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/451/ END:VEVENT BEGIN:VEVENT SUMMARY:Long-lived particles at Spallation Neutron Sources DTSTART;VALUE=DATE-TIME:20250917T080000Z DTEND;VALUE=DATE-TIME:20250917T082000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-455@indico.ift.uam-csic.es DESCRIPTION:Speakers: Salvador Urrea González (IJCLab)\nSpallation neutro n sources can provide an intense source of new\, light particles from the decay at rest of pions\, muons\, and kaons.\nConsidering a variety of spal lation sources around the world\, we study the sensitivity of existing neu trino detectors to the decay of these new particles.\nAt J-PARC\, we show that the fast\, magnetized\, gaseous argon chambers of the ND280 detector could place leading limits on light particles decaying to $e^+e^-$ and tha t the liquid-scintillator detectors of the J-PARC Sterile Neutrino Search at the JSNS (JSNS$^2$) experiment can exploit double- and triple-coinciden ce signals from $\\mu^+\\mu^-$ and $\\pi^+\\pi^-$ to place new limits on h eavy neutral leptons.\nAt Oak Ridge\, we show that the suite of detectors at the COHERENT experiment\, despite their smaller size\, would also have world-leading sensitivity to axion-like-particles and muonphilic light sca lars.\nWe also discuss new opportunities for Coherent Captain Mills at Los Alamos and compare our results to on-going searches at the Short-Baseline Neutrino Program at Fermilab.\nSpallation sources have the potential to e xplore more than an order of magnitude beyond current constraints in some new physics models\, encouraging further study on data acquisition and bac kground rejection by experimental collaborations.\n\nhttps://indico.ift.ua m-csic.es/event/29/contributions/455/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/455/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of FIP searches at fixed-target experiments DTSTART;VALUE=DATE-TIME:20250917T073000Z DTEND;VALUE=DATE-TIME:20250917T080000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-479@indico.ift.uam-csic.es DESCRIPTION:Speakers: Maksym Ovchynnikov (CERN\, Department of Theoretical Physics)\nhttps://indico.ift.uam-csic.es/event/29/contributions/479/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/479/ END:VEVENT BEGIN:VEVENT SUMMARY:FIP/LLP searches at LHCb DTSTART;VALUE=DATE-TIME:20250916T132000Z DTEND;VALUE=DATE-TIME:20250916T134500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-478@indico.ift.uam-csic.es DESCRIPTION:Speakers: Andrii Usachov ()\nhttps://indico.ift.uam-csic.es/ev ent/29/contributions/478/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/478/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Sector searches at Belle II DTSTART;VALUE=DATE-TIME:20250916T125500Z DTEND;VALUE=DATE-TIME:20250916T132000Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-477@indico.ift.uam-csic.es DESCRIPTION:Speakers: Graziani ()\nhttps://indico.ift.uam-csic.es/event/29 /contributions/477/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/477/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of BSM searches at forward physics experiments DTSTART;VALUE=DATE-TIME:20250916T122500Z DTEND;VALUE=DATE-TIME:20250916T125500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-476@indico.ift.uam-csic.es DESCRIPTION:Speakers: Felix Kling ()\nhttps://indico.ift.uam-csic.es/event /29/contributions/476/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/476/ END:VEVENT BEGIN:VEVENT SUMMARY:Registration DTSTART;VALUE=DATE-TIME:20250916T114500Z DTEND;VALUE=DATE-TIME:20250916T121500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-475@indico.ift.uam-csic.es DESCRIPTION:https://indico.ift.uam-csic.es/event/29/contributions/475/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/475/ END:VEVENT BEGIN:VEVENT SUMMARY:The cosmic origin of matter from exact proton stability DTSTART;VALUE=DATE-TIME:20250916T152500Z DTEND;VALUE=DATE-TIME:20250916T154500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-456@indico.ift.uam-csic.es DESCRIPTION:Speakers: Xavier Ponce Diaz (University of Basel)\nIn this tal k\, we revisit a class of lepton-flavor non-universal gauge extensions of the Standard Model that provide a compelling framework for generating neut rino masses and mixing angles via a high-scale seesaw mechanism\, while en suring exact proton stability to all orders in the effective field theory. This setup naturally accommodates minimal thermal leptogenesis\, offering a robust explanation for the observed matter-antimatter asymmetry. A feat ure of this construction is the prediction of a light pseudo-Nambu-Goldsto ne boson\, the majoron\, whose properties and couplings we examine in the context of dark matter\, cosmology\, and ongoing experimental searches.\n\ nhttps://indico.ift.uam-csic.es/event/29/contributions/456/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/456/ END:VEVENT BEGIN:VEVENT SUMMARY:Heavy Neutral Lepton searches at ICARUS-NuMI DTSTART;VALUE=DATE-TIME:20250916T150500Z DTEND;VALUE=DATE-TIME:20250916T152500Z DTSTAMP;VALUE=DATE-TIME:20260311T125244Z UID:indico-contribution-29-445@indico.ift.uam-csic.es DESCRIPTION:Speakers: Josu Hernandez-Garcia (IFIC\, CSIC-UV)\nLong-lived p articles (LLPs) could serve as a portal to hidden sectors addressing diffe rent open problems of the Standard Model. Among these\, the evidence for n eutrino masses and mixings—observed in neutrino oscillation experiments —stands out as particularly promising. A simple extension to the SM invo lves the inclusion of heavy right-handed neutrinos\, commonly known as hea vy neutral leptons (HNLs). In minimal models\, the HNL production and deca y are governed by weak interactions\, suppressed by their mixing with acti ve neutrinos. This suppression leads to relatively long HNL lifetimes when their masses lie within the MeV–GeV range.\nThe near-detector complexes of current and upcoming neutrino oscillation experiments provide an optim al environment for searching for visible HNL decays\, given the high inten sity of the beams and the volume of the detectors involved. We have conduc ted a comprehensive study on both the physics case and the technical feasi bility of a dedicated HNL search utilizing the 120-GeV proton NuMI beam wi th an ICARUS-like detector. Our analysis indicates that the projected cons traints on HNL mixing as a function of its mass will be highly competitive with existing experimental limits.\n\nhttps://indico.ift.uam-csic.es/even t/29/contributions/445/ LOCATION:IFT UAM/CSIC URL:https://indico.ift.uam-csic.es/event/29/contributions/445/ END:VEVENT END:VCALENDAR