Sep 12 – 16, 2016
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Spectral asymmetries of Galactic pulsars and the signature of photon-ALPs mixing

Sep 14, 2016, 2:00 PM
500/1-201 - Mezzanine (CERN)

500/1-201 - Mezzanine


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Poster Contributions Dark matter (indirect detection) Poster Session (coffee at 15:00) & CERN Visit


Ms Jhilik Majumdar (Institut für Experimentalphysik, University of Hamburg)


Abstract : 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 two gamma-ray pulsar 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.

Primary author

Ms Jhilik Majumdar (Institut für Experimentalphysik, University of Hamburg)

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