R-parity violating resonant stop production at the Large Hadron Collider

TL;DR

This paper explores the potential to detect R-parity violating resonant stop production at the LHC, analyzing various decay channels, backgrounds, and the impact of different energies and couplings.

Contribution

It provides a detailed simulation study of resonant stop production in R-parity violating supersymmetry, including decay modes, backgrounds, and detection prospects at different collider energies.

Findings

Higher stop masses can be easier to probe through cascade decays.

Resonant production signals may be detectable at 7, 10, and 14 TeV for certain couplings.

Stop masses around 1 TeV can be probed with couplings as low as 0.05.

Abstract

We have investigated the resonant production of a stop at the Large Hadron Collider, driven by baryon number violating interactions in supersymmetry. We work in the framework of minimal supergravity models with the lightest neutralino being the lightest supersymmetric particle which decays within the detector. We look at various dilepton and trilepton final states, with or without b-tags. A detailed background simulation is performed, and all possible decay modes of the lighter stop are taken into account. We find that higher stop masses are sometimes easier to probe, through the decay of the stop into the third or fourth neutralino and their subsequent cascades. We also comment on the detectability of such signals during the 7 TeV run, where, as expected, only relatively light stops can be probed. Our conclusion is that the resonant process may be probed, at both 10 and 14 TeV, with the R-parity violating coupling {\lambda}"_{312} as low as 0.05, for a stop mass of about 1 TeV. The possibility of distinguishing between resonant stop production and pair-production is also discussed.