|
Statut |
Confirmé |
|
Série |
LPTHE-PPH |
|
Domaines |
hep-ph |
|
Date |
Vendredi 20 Septembre 2024 |
|
Heure |
14:00 |
|
Institut |
LPTHE |
|
Salle |
Library and Zoom (link in the comments) |
|
Nom de l'orateur |
Jeesun |
|
Prenom de l'orateur |
Sk |
|
Addresse email de l'orateur |
skjeesun48 [at] gmail [dot] com |
|
Institution de l'orateur |
Indian Association for the Cultivation of Science, Kolkata |
|
Titre |
Studying dark sector imprints in cosmology and ground based experiments. |
|
Résumé |
Relativistic degrees of freedom or N_eff is one of the crucial cosmological
parameters and is sensitive to extra radiation energy density at the time of
neutrino decoupling. The precise measurement of $N_eff$ at the time of CMB
formation by Planck 2018 can be used to understand fundamental interactions and to
shed light on beyond standard model (BSM) scenarios. In this talk I will explain
how N_eff can probe light (MeV) freeze in dark matter models which contain
additional neutrino injection at late time. We propose a scenario where a long
lived scalar decays to a dark matter and active neutrinos after BBN. Despite the
feeble coupling of DM the parameter space can be probed via N_eff. I will also
talk about how N_eff at CMB can constrain light Z' gauge boson realized in generic
BSM U(1)_X scenarios. Finally, from the perspective of ground based experiments,
I will show how table top experiments like optically trapped nanospheres can shed
light on MeV scale dark matter and other BSM particles like ALP. |
|
Numéro de preprint arXiv |
|
|
Commentaires |
The seminar will be in person, but Zoom attendance is possible:
https://cern.zoom.us/j/63031219326?pwd=STlDY2l0UTZOTWd3Ty8zaWVQSzNTdz09 |
|
Fichiers attachés |
- Paris_LPTHE_Jeesun_compressed.pdf (5315979 bytes)
|
