Speaker
Vivian Poulin
(LAPTh, Annecy-le-vieux and RWTH, Aachen)
Description
In this talk, I would like to review how the combination of CMB power spectra, spectral distortions and BBN can be used to put stringeant constraints on the lifetime and abundance of exotic particles (such as dark matter but not only) with electromagnetic decay products. I will emphasize that this has the major advantages over cosmic rays of beeing (almost) free of theoritical uncertainties and to extend to very short lifetimes (few minutes after the big bang). Results using the very last Planck CMB data will be shown. I will then present how 21cm signal, one of the main target of future experiments, could be used in order to improve (but not always !) over these bounds.
Author
Vivian Poulin
(LAPTh, Annecy-le-vieux and RWTH, Aachen)
Co-author
Pasquale Serpico
(Unite Reseaux du CNRS (FR))
