%0 Generic %1 caputo2022lowenergy %A Caputo, Andrea %A Janka, Hans-Thomas %A Raffelt, Georg %A Vitagliano, Edoardo %D 2022 %K tifr %T Low-Energy Supernovae Severely Constrain Radiative Particle Decays %U http://arxiv.org/abs/2201.09890 %X The hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly-interacting particles such as sterile neutrinos, dark photons, axion-like particles (ALPs), and others. Radiative decays such as $a\to2\gamma$ deposit this energy in the surrounding material if the mean free path is less than the radius of the progenitor star. For the first time, we use a supernova (SN) population with particularly low explosion energies as the most sensitive calorimeters to constrain this possibility. These SNe are observationally identified as low-luminosity events with low ejecta velocities and low masses of ejected $^56$Ni. Their low energies limit the energy deposition from particle decays to less than about 0.1 B, where $1~\rm B~(bethe)=10^51~erg$. For 1-500 MeV-mass ALPs, this generic argument excludes ALP-photon couplings $G_a\gamma\gamma$ in the $10^-10$-$10^-8~GeV^-1$ range.

@misc{caputo2022lowenergy, abstract = {The hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly-interacting particles such as sterile neutrinos, dark photons, axion-like particles (ALPs), and others. Radiative decays such as $a\to2\gamma$ deposit this energy in the surrounding material if the mean free path is less than the radius of the progenitor star. For the first time, we use a supernova (SN) population with particularly low explosion energies as the most sensitive calorimeters to constrain this possibility. These SNe are observationally identified as low-luminosity events with low ejecta velocities and low masses of ejected $^{56}$Ni. Their low energies limit the energy deposition from particle decays to less than about 0.1 B, where $1~{\rm B~(bethe)}=10^{51}~{\rm erg}$. For 1-500 MeV-mass ALPs, this generic argument excludes ALP-photon couplings $G_{a\gamma\gamma}$ in the $10^{-10}$-$10^{-8}~{\rm GeV}^{-1}$ range.}, added-at = {2022-01-26T07:09:17.000+0100}, author = {Caputo, Andrea and Janka, Hans-Thomas and Raffelt, Georg and Vitagliano, Edoardo}, biburl = {https://www.bibsonomy.org/bibtex/25bb0d45c7dca081039dac695f1712e1c/citekhatri}, description = {Low-Energy Supernovae Severely Constrain Radiative Particle Decays}, interhash = {237e2710dc28a8f925f881a98a450ec5}, intrahash = {5bb0d45c7dca081039dac695f1712e1c}, keywords = {tifr}, note = {cite arxiv:2201.09890Comment: 5+3 pages, 2+2 figures}, timestamp = {2022-01-26T07:09:17.000+0100}, title = {Low-Energy Supernovae Severely Constrain Radiative Particle Decays}, url = {http://arxiv.org/abs/2201.09890}, year = 2022 }