Elsevier

Physics Letters B

Volume 781, 10 June 2018, Pages 376-382
Physics Letters B

Dark matter contribution to b → sμ+μ anomaly in local U(1)LμLτ model

https://doi.org/10.1016/j.physletb.2018.04.012Get rights and content
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Abstract

We propose a local U(1)LμLτ model to explain bsμ+μ anomaly observed at the LHCb and Belle experiments. The model also has a natural dark matter candidate N. We introduce SU(2)L-doublet colored scalar q˜ to mediate bs transition at one-loop level. The U(1)LμLτ gauge symmetry is broken spontaneously by the scalar S. All the new particles are charged under U(1)LμLτ. We can obtain C9μ,NP1 to solve the bsμ+μ anomaly and can explain the correct dark matter relic density of the universe, ΩDMh20.12, simultaneously, while evading constraints from electroweak precision tests, neutrino trident experiments and other quark flavor-changing loop processes such as bsγ and BsBs mixing. Our model can be tested by searching for Z and new colored scalar at the LHC and BKνν process at Belle-II.

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