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Title: Explaining dark matter and B decay anomalies with an Lμ - Lτ model

Abstract

We present a dark sector model based on gauging the Lμ - Lτ symmetry that addresses anomalies in b→ sμ+μ- decays and that features a particle dark matter candidate. The dark matter particle candidate is a vector-like Dirac fermion coupled to the Z' gauge boson of the Lμ - Lτ symmetry. We compute the dark matter thermal relic density, its pair-annihilation cross section, and the loop-suppressed dark matter-nucleon scattering cross section, and compare our predictions with current and future experimental results. We demonstrate that after taking into account bounds from Bs meson oscillations, dark matter direct detection, and the CMB, the model is highly predictive: B physics anomalies and a viable particle dark matter candidate, with a mass of ~ (5 - 23) GeV, can be accommodated only in a tightly-constrained region of parameter space, with sharp predictions for future experimental tests. The viable region of parameter space expands if the dark matter is allowed to have Lμ - Lτ charges that are smaller than those of the SM leptons.

Authors:
 [1];  [1];  [2];  [3]
  1. Univ. of Cincinnati, OH (United States). Dept. of Physics
  2. Univ. of California, Santa Cruz, CA (United States). Dept. of Physics. Santa Cruz Inst. for Particle Physics
  3. Max Planck Inst. for Nuclear Physics, Heidelberg (Germany)
Publication Date:
Research Org.:
Univ. of California, Santa Cruz, CA (United States); Univ. of Cincinnati, OH (United States); Max Planck Inst. for Nuclear Physics, Heidelberg (Germany)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Mainz Inst. for Theoretical Physics (MITP) (Germany)
OSTI Identifier:
1368039
Grant/Contract Number:  
SC0010107; PHY-1066293
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 12; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Cosmology of Theories beyond the SM; Beyond Standard Model; Gauge Symmetry

Citation Formats

Altmannshofer, Wolfgang, Gori, Stefania, Profumo, Stefano, and Queiroz, Farinaldo S. Explaining dark matter and B decay anomalies with an Lμ - Lτ model. United States: N. p., 2016. Web. doi:10.1007/JHEP12(2016)106.
Altmannshofer, Wolfgang, Gori, Stefania, Profumo, Stefano, & Queiroz, Farinaldo S. Explaining dark matter and B decay anomalies with an Lμ - Lτ model. United States. https://doi.org/10.1007/JHEP12(2016)106
Altmannshofer, Wolfgang, Gori, Stefania, Profumo, Stefano, and Queiroz, Farinaldo S. Tue . "Explaining dark matter and B decay anomalies with an Lμ - Lτ model". United States. https://doi.org/10.1007/JHEP12(2016)106. https://www.osti.gov/servlets/purl/1368039.
@article{osti_1368039,
title = {Explaining dark matter and B decay anomalies with an Lμ - Lτ model},
author = {Altmannshofer, Wolfgang and Gori, Stefania and Profumo, Stefano and Queiroz, Farinaldo S.},
abstractNote = {We present a dark sector model based on gauging the Lμ - Lτ symmetry that addresses anomalies in b→ sμ+μ- decays and that features a particle dark matter candidate. The dark matter particle candidate is a vector-like Dirac fermion coupled to the Z' gauge boson of the Lμ - Lτ symmetry. We compute the dark matter thermal relic density, its pair-annihilation cross section, and the loop-suppressed dark matter-nucleon scattering cross section, and compare our predictions with current and future experimental results. We demonstrate that after taking into account bounds from Bs meson oscillations, dark matter direct detection, and the CMB, the model is highly predictive: B physics anomalies and a viable particle dark matter candidate, with a mass of ~ (5 - 23) GeV, can be accommodated only in a tightly-constrained region of parameter space, with sharp predictions for future experimental tests. The viable region of parameter space expands if the dark matter is allowed to have Lμ - Lτ charges that are smaller than those of the SM leptons.},
doi = {10.1007/JHEP12(2016)106},
journal = {Journal of High Energy Physics (Online)},
number = 12,
volume = 2016,
place = {United States},
year = {Tue Dec 20 00:00:00 EST 2016},
month = {Tue Dec 20 00:00:00 EST 2016}
}

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