Axion-like particles (ALPs) can account for the observed dark matter (DM) of the Universe and if their masses are at the eV scale, they can decay into
infrared, optical and ultraviolet photons
{with a decay lifetime larger than the age of the Universe}.
We analyze multi-wavelength data obtained from the central region of Messier 87 (M87) galaxy
by several telescopes, such as, Swift,...
Apart from its gravitational interactions, dark matter (DM) has remained so
far elusive in laboratory searches. One possible explanation is that the relevant interactions
to explain its relic abundance are mainly gravitational. In this work we consider an extra-
dimensional Randall-Sundrum scenario with a TeV-PeV IR brane, where the Standard
Model is located, and a GeV-TeV deep IR (DIR) one,...
We 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 then 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...
In this talk I will present a new potential signature of supernovae axion-like particles (ALPs) in neutrino water Cherenkov detectors. If ALPs couple to protons, then they can be detected through ALP absorption on free protons, $a\ p→p\ γ$, where the resulting photon has approximately the energy of the ALP. This new signature is complementary to the usual one from oxygen de-excitation, and...
