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Heavy Vector-like quark with charge 5/3 at the LHC

Abstract : We study the phenomenology at the Large Hadron Collider of an exotic vector-like quark X with charge +5/3. We relax the assumption of a 100% branching into W t and allow for an arbitrary rate into W plus light quarks, thus covering all possible scenarios. Sizeable decays into light quarks can be achieved, for instance, in a model where the X quark is embedded in a doublet with hypercharge 7/6, which also contains a t' quark. We study the bounds on the parameter space of this model, and perform a detailed simulation of the X pair production and decays. We show that the final state with W t W q, where q=u or c, contributes to the same sign dilepton searches, and that the reach can be improved with alternative cuts optimised on such final state.
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http://hal.in2p3.fr/in2p3-00754031
Contributor : Sylvie Flores <>
Submitted on : Tuesday, November 20, 2012 - 7:34:24 AM
Last modification on : Tuesday, November 19, 2019 - 2:37:49 AM

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G. Cacciapaglia, A. Deandrea, S. Perries, V. Sordini, L. Panizzi. Heavy Vector-like quark with charge 5/3 at the LHC. Journal of High Energy Physics, Springer, 2013, 1303, pp.004. ⟨10.1007/JHEP03(2013)004⟩. ⟨in2p3-00754031⟩

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