Photonic dark matter portal revisited

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Alavi, S.A.^1 ; Kazemian, F.S.^1

Department of Physics, Hakim Sabzevari University, Sabzevar, Iran^1

关键词: Aharonov-Bohm phase;    Coupling constants;    Exotic atoms;    Galaxy clusters;    Hydrogen atoms;    Standard model;    Upper limits;    X ray observatories;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042002/pdf
DOI  :  10.1088/1742-6596/718/4/042002

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

In our previous paper, 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 as f ≤ 10-12. 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 as f ≤ 10-13. 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 ΔEDM= 3.5 keV.