LHC Signatures of a Vector-like b'

Details LHC Signatures of a Vector-like b' LHC Signatures of a Vector-like b'

2011-07-21

arxiv.org/abs/1107.4306v2

Phys.Rev.D84:055001,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 6 figures, minor changes, reference added, journal version

Scientific paper

10.1103/PhysRevD.84.055001

Many beyond the standard model extensions predict the existence of heavy vector-like fermions. We study the LHC signatures of one such heavy vector-like fermion, called b', with electromagnetic charge -1/3 like the SM b-quark, but which could generically have different SU(2)_L and U(1)_Y quantum numbers. Our emphasis will be on the phenomenology due to b <-> b' mass-mixing, present after electroweak symmetry breaking. We focus on aspects which distinguish a vector-like b' from a chiral b' and include tree-level decays of the b' into t W, b Z and b h final states. While our analysis is largely model-independent, we take as a motivating example warped-space models in which a vector-like b' appears as the custodial partner of the top-quark.

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