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Inelastic extra U(1) charged scalar dark matter

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Title: Inelastic extra U(1) charged scalar dark matter
Authors: Okada, Nobuchika Browse this author
Seto, Osamu Browse this author →KAKEN DB
Issue Date: 24-Jan-2020
Publisher: American Physical Society
Journal Title: Physical Review D
Volume: 101
Issue: 2
Start Page: 023522
Publisher DOI: 10.1103/PhysRevD.101.023522
Abstract: The null results in dark matter direct detection experiments imply the present scalar dark matter (DM) annihilation cross section to bottom quark pairs through the Eliggs boson exchange is smaller than about 10(-31) cm(3)/s for a wide DM mass range, which is much smaller than the required annihilation cross section for thermal relic DM. We propose models of a thermal relic DM with the present annihilation cross section being very suppressed. This property can be realized in an extra U(1) gauge interacting complex scalar DM, where the thermal DM abundance is determined by coannihilation through the gauge interaction while the present annihilation is governed by Higgs bosons exchange processes. An interaction between DM and the extra U(1) breaking Higgs field generates a small mass splitting between DM and its coannihilating partner so that coannihilation becomes possible and also the Z'-mediated scattering off with a nucleon in direct DM search becomes inelastic. We consider scalar dark matter in U(1)(B-L), U(1)((B,L)3) and U(1)L-mu-L-tau, extended models and identify viable parameter regions. We also discuss various implications to future DM detection experiments, the DM interpretation of the gamma-ray excess in the globular cluster 47 Tucanae, the muon anomalous magnetic moment, the Hubble tension and others.
Type: article
Appears in Collections:高等教育推進機構 (Institute for the Advancement of Higher Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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