Abstract
Heavy vector-like quarks of charge −1/3, B, have been searched for at the LHC through the decays B → bZ, bh, tW. In models where the B quark also carries charge under a new gauge group, new decay channels may dominate. We focus on the case where the B is charged under a U(1)′ and describe simple models where the dominant decay mode is \( B\to bZ^{\prime}\to b\left(b\overline{b}\right) \). With the inclusion of dark matter such models can explain the excess of gamma rays from the Galactic center. We develop a search strategy for this decay chain and estimate that with integrated luminosity of 300 fb−1 the LHC will have the potential to discover both the B and the Z′ for B quarks with mass below ∼ 1.6 TeV, for a broad range of Z′ masses. A high-luminosity run can extend this reach to 2 TeV.
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Fox, P.J., Tucker-Smith, D. Exotic decays of heavy B quarks. J. High Energ. Phys. 2016, 38 (2016). https://doi.org/10.1007/JHEP01(2016)038
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DOI: https://doi.org/10.1007/JHEP01(2016)038