Color-octet scalars at the LHC
Abstract
Color-octet scalars, if present at the TeV scale, will be produced in abundance at the LHC. We discuss in some detail the phenomenology of scalars in the (8,2)_{1/2} representation, recently identified by Manohar and Wise as an addition to the standard-model Higgs sector consistent with the principle of minimal flavor violation. Couplings of this multiplet to the Higgs lift the mass degeneracy among its states, possibly allowing for two-body decays of a heavier colored scalar to a lighter one and a gauge boson. We perform a renormalization group analysis of these couplings and find that limits from Tevatron searches leave little room for these decays. This fact, and the assumption of minimal flavor violation, lead us to study the case where the octets decay to the heaviest kinematically accessible fermion pairs. Focusing on pair-production events leading to (t t-bar t t-bar), (b b-bar b b-bar), and (b b-bar t t-bar) final states, we find that discovery at the LHC should be possible up to masses exceeding 1 TeV.
Keywords
Cite
@article{arxiv.0710.3133,
title = {Color-octet scalars at the LHC},
author = {Michael Gerbush and Teng Jian Khoo and Daniel Phalen and Aaron Pierce and David Tucker-Smith},
journal= {arXiv preprint arXiv:0710.3133},
year = {2008}
}
Comments
15 pages, 6 figues; corrected typos and added discussion of decays to b b-bar