Light Stop Searches at the LHC in Events with two b-Jets and Missing Energy
Abstract
We propose a new method to discover light top squarks (stops) in the co-annihilation region at the Large Hadron Collider (LHC). The bino-like neutralino is the lightest supersymmetric particle (LSP) and the lighter stop is the next-to-LSP. Such scenarios can be consistent with electroweak baryogenesis and also with dark matter constraints. We consider the production of two stops in association with two b-quarks, including pure QCD as well as mixed electroweak-QCD contributions. The stops decay into a charm quark and the LSP. For a higgsino-like light chargino the electroweak contributions can exceed the pure QCD prediction. We show the size of the electroweak contributions as a function of the stop mass and present the LHC discovery reach in the stop-neutralino mass plane.
Keywords
Cite
@article{arxiv.1011.5508,
title = {Light Stop Searches at the LHC in Events with two b-Jets and Missing Energy},
author = {S. Bornhauser and M. Drees and S. Grab and J. S. Kim},
journal= {arXiv preprint arXiv:1011.5508},
year = {2011}
}
Comments
12 pages, 10 figures