Heavy flavor simplified models at the LHC

Abstract

We consider a comprehensive set of simplified models that contribute to final states with top and bottom quarks at the LHC. These simplified models are used to create minimal search strategies that ensure optimal coverage of new heavy flavor physics involving the pair production of color octets and triplets. We provide a set of benchmarks that are representative of model space, which can be used by experimentalists to perform their own optimization of search strategies. For data sets larger than 1 fb −1 , same-sign dilepton and 3b search regions become very powerful. Expected sensitivities from existing and optimized searches are given.

Compressed electroweakino spectra at the LHC

“…The spectrum then contains two light neutralinos χ 0 1,2 and one chargino χ ± 1 which are gaugino-like and whose mass splitting is controlled by M 2 − M 1 , and heavier states at the scale µ which are higgsino-like. In the context of Natural SUSY [21][22][23][24][25] the opposite limit is achieved, namely µ ∼ O(100) GeV and M 1 , M 2 1 TeV. Qualitatively the same spectrum is obtained, but with the light (heavy) states being Higgsino (gaugino)-like.…”

Stop the top background of the stop search

“…Many third generation squark searches at the LHC rely on gluino production, with subsequent decay to stops or sbottoms [13][14][15][16][17][18][19]. This is because the production cross section for gluino is much larger than for direct stop or sbottom production, as long as the gluino mass is not much heavier.…”

Impact of LHC searches on NLSP top squark and gluino mass

“…In a recent paper, hereafter called [3], we explored the implications of the recent ATLAS and CMS searches for the NLSP stop scenario. The neutralino-stop coannihilation scenario can arise in realistic supersymmetric SU (5) and SO(10) models with b−τ Yukawa unification at M GU T [4]. In Ref.…”

“…Other recent papers related to the NLSP stop scenario are in Refs. [5][6][7][8][9][10] (other related scenarios include bino-sbottom coannihilation [11]). Motivated by these considerations in this paper we pursue a model-independent analysis of the NLSP stop scenario.…”