We analyze the effects of the s-channel Higgs bosons exchange on the charginos-pair and neutralinos-pair production in proton-proton collision at the CERN Large Hadron Collider (LHC) in the following channels: pp→χ E+χ E-/χ E0χ E0+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∼|μ| with moderate to large β 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-pair and neutralinos-pair production at the LHC from bb̄ initial state can be large and observable at LHC. We also compute the full complete set of electroweak (EW) contributions to pp→gg→χ E +χ E-/χ E0χ E0+X at the one-loop level in the general MSSM. The analytical computation of the complete tree-level amplitude for bb̄→χ E+χ E-/χ E0χ E0+X, including s-channel Higgs exchange, is given.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2011 Dec 14|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)