Pair production of neutralinos and charginos at the LHC: the role of Higgs bosons exchange

Abstract

We analyze the effects of the s-channel Higgs bosons exchange on the charginos and neutralinos-pair production in proton-proton collision at the CERN Large Hadron Collider (LHC) in the following channels: $pp \to \Cha^+\Cha^-/\Neu^0\Neu^0 + X$, within the minimal supersymmetric standard model (MSSM). Assuming the usual GUT relation between $M_1$ and $M_2$ at the weak scale, we found that substantial enhancement can be obtained through s-channel Higgs bosons exchange in the mixed regime where $M_2\sim |\mu |$ with moderate to large $\tan \beta$ at the resonance of the heavy Higgs bosons. By Combining the phenomenological constraints on neutralinos and charginos, we may still find regions of parameter space where charginos and neutralinos-pair production at the LHC from $b\bar{b}$ initial state can be large and observable at LHC. We also compute the full complete set of electroweak (EW) contributions to $pp\to gg\to \Cha^+\Cha^-/\Neu^0\Neu^0 + X$ at one loop level in the general MSSM. The analytical computation of the complete tree level amplitude for $b\bar{b} \to \Cha^+\Cha^-/\Neu^0\Neu^0 + X$, including s-channel Higgs exchange, is given.

Accepted to be published in PRD

References in corpus (7)

• Implications of CTEQ global analysis for collider observables
• Search for Neutral MSSM Higgs Bosons Decaying to Tau Pairs in pp Collisions at sqrt(s)=7 TeV
• Constraints on B and Higgs Physics in Minimal Low Energy Supersymmetric Models
• Four-lepton LHC events from MSSM Higgs boson decays into neutralino and chargino pairs
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Cited by in corpus (5)

• The Not-So-Well Tempered Neutralino
• Study of MSSM heavy Higgs bosons decaying into charginos and neutralinos
• Searching for heavy Higgs in supersymmetric final states at the LHC
• Characterizing simplified models for heavy Higgs decays to supersymmetric particles
• Electroweak Corrections to the Neutralino Pair Production at CERN LHC