Regular Article - Theoretical Physics
Large Hadron Collider constraints on a light baryon-number violating sbottom coupling to a top and a light quark
DAMTP, CMS, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA, UK
* e-mail: email@example.com
Accepted: 12 December 2013
Published online: 28 January 2014
We investigate a model of -parity violating (RPV) supersymmetry in which the right-handed sbottom is the lightest supersymmetric particle, and a baryon-number violating coupling involving a top is the only non-negligible RPV coupling. This model evades proton decay and flavour constraints. We consider in turn each of the couplings and as the only non-negligible RPV coupling, and we recast a recent LHC measurement (CMS top transverse momentum spectrum) and a LHC search (ATLAS multiple jet resonance search) in the form of constraints on the mass–coupling parameter planes. We delineate a large region in the parameter space of the mass of the sbottom () and the coupling that is ruled out by the measurements, as well as a smaller region in the parameter space of and . A certain region of the parameter space was previously found to successfully explain the anomalously large forward–backward asymmetry measured by Tevatron experiments. This entire region is now excluded at the 95 confidence level (CL) by CMS measurements of the spectrum. We also present distributions of the Tevatron forward–backward asymmetry for this model.
© The Author(s), 2014