FCNC-induced heavy-quark events at the LHC from Supersymmetry

Abstract

We analyze the production and subsequent decay of the neutral Higgs bosons of the MSSM into electrically neutral quark pairs qq'=bs,tc of different flavors at the LHC and compare with the direct FCNC production mechanisms. The cross-sections are computed in the unconstrained MSSM with minimal flavor-mixing sources and taking into account the stringent bounds from radiative B-meson decays. We extend the results previously found for these FCNC processes, which are singularly uncommon in the SM. Specifically, we report here on the SUSY-EW contribution of the Higgs-mediated FCNC cross-section into bs and tc final states and the SUSY-QCD and SUSY-EW contributions to bs-production. In this way, the complete map of MSSM predictions for the qq'-pairs produced at the LHC becomes available. The upshot is that the most favorable channels are: 1) the Higgs boson FCNC decays into bs, and 2) the direct production of tc pairs, both of them at the 1 pb level and mediated by SUSY-QCD effects. If, however, the latter are suppressed, we find a small SUSY-EW yield for the tc-production through Higgs decays but, at the same time, a cross-section of 0.1-1 pb for bs-production, which implies a significant number (10^4-10^5) of bs-pairs per 100 inverse femtobarn of integrated luminosity.

LaTeX, 17 pages, 4 figures, 4 tables. Extended discussion. Accepted in Phys. Lett. B

References in corpus (10)

• The Muon Magnetic Moment and Supersymmetry
• Techniques for the calculation of electroweak radiative corrections at the one-loop level and results for W-physics at LEP200
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Experimental Constraints on Scharm-Stop Flavor Mixing and Implications in Top-quark FCNC Processes
• Combined effects of strong and electroweak FCNC effective operators in top quark physics at the LHC
• Single top-quark production by direct supersymmetric flavor-changing neutral-current interactions at the LHC
• Single top-quark production by strong and electroweak supersymmetric flavor-changing interactions at the LHC
• Flavor Changing Higgs Decays in Supersymmetry with Minimal Flavor Violation
• SUSY Higgs boson flavor-changing neutral currents at the LHC
• Top quark rare decays in a two Higgs doublet model for the top

Cited by in corpus (8)

• Squark Flavor Violation at the LHC
• Enhancing $thj$ Production from Top-Higgs FCNC Couplings
• Impact of squark generation mixing on the search for squarks decaying into fermions at LHC
• Searches for anomalous $tqZ$ couplings from the trilepton signal of $tZ$ associated production at the 14 TeV LHC
• Searches for the FCNC couplings from top-Higgs associated production signal with $h\to \gamma \gamma$ at the LHC
• Probing the Top Quark Flavour-Changing Neutral Current at a Future Electron-Positron Collider
• Effective Yukawa couplings and flavor-changing Higgs boson decays at linear colliders
• Machine Learning Approaches to Top Quark Flavor-Changing Four-Fermion Interactions in Trilepton Signals at the LHC