Title: Self-interacting dark matter and muon (g - 2) in a gauged U ( 1 ) L μ − L τ model

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4]
  1. Inst. for Basic Science (IBS), Daejeon (Korea, Republic of). Center for Theoretical Physics of the Universe; Univ. of Minnesota, Minneapolis (United States)
  2. Inst. for Basic Science (IBS), Daejeon (Korea, Republic of). Center for Theoretical Physics of the Universe; Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy. William I. Fine Theoretical Physics Inst.
  3. Univ. of Tokyo (Japan). Dept. of Physics
  4. Univ. of California, Riverside, CA (United States). Dept. of Physics and Astronomy

We construct a self-interacting dark matter model that could simultaneously explain the observed muon anomalous magnetic moment. It is based on a gauged U ( 1 ) L μ − L τ extension of the standard model, where we introduce a vector-like pair of fermions as the dark matter candidate and a new Higgs boson to break the symmetry. The new gauge boson has a sizable contribution to muon (g - 2), while being consistent with other experimental constraints. The U ( 1 ) L μ − L τ Higgs boson acts as a light force carrier, mediating dark matter self-interactions with a velocity-dependent cross section. It is large enough in galaxies to thermalize the inner halo and explain the diverse rotation curves and diminishes towards galaxy clusters. Since the light mediator dominantly decays to the U ( 1 ) L μ − L τ gauge boson and neutrinos, the astrophysical and cosmological constraints are weak. We study the thermal evolution of the model in the early Universe and derive a lower bound on the gauge boson mass.

Research Organization:
Inst. for Basic Science (IBS), Daejeon (Korea, Republic of); Univ. of California, Riverside, CA (United States); Univ. of Minnesota, Minneapolis, MN (United States); Univ. of Tokyo (Japan)
Sponsoring Organization:
Inst. for Basic Science (IBS) (Korea, Republic of); Japan Society for the Promotion of Science (JSPS); National Science Foundation (NSF) (United States); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
SC0008541; SC0011842
OSTI ID:
1505139
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 6 Vol. 2018; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Rapid bound-state formation of Dark Matter in the Early Universe text January 2020
Displaced Lepton Jet Signatures from Self-Interacting Dark Matter Bound States text January 2018
Non-Standard Neutrino Interactions and Neutral Gauge Bosons text January 2018
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Neutrino Tridents at DUNE text January 2019
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