Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP12(2016)106
Keywords
Cosmology of Theories beyond the SM; Beyond Standard Model; Gauge Symmetry
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Funding
- University of Cincinnati
- National Science Foundation [PHY-1066293]
- U.S. Department of Energy [DE-SC0010107]
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We present a dark sector model based on gauging the L-mu - L-tau symmetry that addresses anomalies in b -> s mu(+) mu(-) 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 L-mu - L-tau 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 B-s 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 similar to (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 L-mu - L-tau charges that are smaller than those of the SM leptons.
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