Heavy Squarks at the LHC

Abstract

The LHC, with its seven-fold increase in energy over the Tevatron, is capable of probing regions of SUSY parameter space exhibiting qualitatively new collider phenomenology. Here we investigate one such region in which first generation squarks are very heavy compared to the other superpartners. We find that the production of these squarks, which is dominantly associative, only becomes rate-limited at mSquark > 4(5) TeV for L~10(100) fb-1. However, discovery of this scenario is complicated because heavy squarks decay primarily into a jet and boosted gluino, yielding a dijet-like topology with missing energy (MET) pointing along the direction of the second hardest jet. The result is that many signal events are removed by standard jet/MET anti-alignment cuts designed to guard against jet mismeasurement errors. We suggest replacing these anti-alignment cuts with a measurement of jet substructure that can significantly extend the reach of this channel while still removing much of the background. We study a selection of benchmark points in detail, demonstrating that mSquark= 4(5) TeV first generation squarks can be discovered at the LHC with L~10(100)fb-1.

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• Where the Sidewalk Ends: Jets and Missing Energy Search Strategies for the 7 TeV LHC
• Composite Octet Searches with Jet Substructure
• QCD resummation for light-particle jets
• Impact of the recent results by the CMS and ATLAS Collaborations at the CERN Large Hadron Collider on an effective Minimal Supersymmetric extension of the Standard Model
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• Augmenting Collider Searches and Enhancing Discovery Potentials through Stochastic Jet Grooming
• QCD correction to gluino decay to $t\bar{t}{\tilde{\chi }}_1^0$ in the MSSM
• Deciphering the MSSM Higgs Mass at Future Hadron Colliders