Distinguishing signatures of top- and bottom-type heavy vectorlike quarks at the LHC

Girdhar, Aarti ; Mukhopadhyaya, Biswarup ; Patra, Monalisa (2015) Distinguishing signatures of top- and bottom-type heavy vectorlike quarks at the LHC Physical Review D - Particles, Fields, Gravitation and Cosmology, 91 (5). Article ID 055015. ISSN 1550-7998

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Official URL: https://journals.aps.org/prd/abstract/10.1103/Phys...

Related URL: http://dx.doi.org/10.1103/PhysRevD.91.055015

Abstract

An SU(2) vectorlike singlet quark with a charge of either +2/3(t′) or −1/3(b′) is predicted in many extensions of the Standard Model. The mixing of these quarks with the top or bottom lead to flavor-changing Yukawa interactions and neutral currents. The decay modes of the heavier mass eigenstates are therefore different from the Standard Model-type chiral quarks. The LHC will provide an ideal environment to look for the signals of these exotic quarks. Considering all decays, including those involving Z and Yukawa interactions, we show how one can distinguish between t′ and b′ from ratios of event rates with different lepton multiplicities. The ability to reconstruct the Higgs boson with a mass around 125.5 GeV plays an important role in such differentiation.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:114526
Deposited On:05 Jun 2018 05:03
Last Modified:05 Jun 2018 05:03

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