Photonic dark matter portal revisited

• Main Authors: Alavi, S. A, Kazemian, F S
• Format: Journal Article
• Language: English
• Published: 18-11-2015
• Subjects: Physics - High Energy Physics - Phenomenology
• DOI: 10.48550/arxiv.1511.05841

J.Phys.Conf.Ser. 718 (2016) no.4, 042002 In our previous paper [1], we studied a model of dark matter (DM) in which
the hidden sector interacts with standard model particles via a hidden photonic
portal (HP). We investigated the effects of this new interaction on the
hydrogen atom and obtained an upper bound for the coupling of the model. In
this work, we study the effects of HP on two interesting exotic atoms namely
muonium and positronium. We obtain a tighter upper limit on the coupling. We
also calculate the change (shift) in the Aharonov-Bohm phase due to HP and find
that the phase shift is negligibly small (for DM particles mass in the GeV
range). Recently a 3.5 keV X ray line signal observed in the spectrum of 73
galaxy clusters, reported by the XXM-Newton X ray observatory. Since in HP
model the DM particles can decay directly into photons, so we finally calculate
the value of the coupling constant f using the condition Delta E=3.5 keV.