5–9 Dec 2016
Nordita, Stockholm
Europe/Stockholm timezone

Searches for modulation of gamma-ray spectra in the Galactic magnetic field as a signature of photon-ALPs mixing

7 Dec 2016, 17:00
30m
FB53 (AlbaNova)

FB53

AlbaNova

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)

Presentation materials