Speaker
Mr
Jhilik Majumdar
(Institute for Experimental Physics, University of Hamburg)
Description
Axion-like particles (ALPs) as an extension of the standard
model define a generic class of light pseudo-sclars with a
rich phenomenology because of their coupling to photons.
Here we explore a so-far neglected opportunity to search for
ALPs-photon coupling in the disappearance channel, i.e. a
characteristic energy dependent suppression of gamma-rays.
To verify this phenomenon we use seven years of Fermi-LAT
Pass 8 data with P8R2_SOURCE_V6 IRFs of a selection f
promising Galactic and Extragalactic sources and investigate
the presence of spectral features of them in accordance with
photon-ALPs coupling using particular models of the
large-scale Galactic magnetic field. We estimate best fit
values of parameters like photon-ALPs coupling and ALPs mass
and we find that the signature of photon-ALPs mixing in
inter galactic magnetictic field leads to an observable range.
Primary author
Mr
Jhilik Majumdar
(Institute for Experimental Physics, University of Hamburg)