Probing RS scenarios of flavour at LHC via leptonic channels

Abstract

We study a purely leptonic signature of the Randall-Sundrum scenario with Standard Model fields in the bulk at LHC: the contribution from the exchange of Kaluza-Klein (KK) excitations of gauge bosons to the clear Drell-Yan reaction. We show that this contribution is detectable (even with the low luminosities of the LHC initial regime) for KK masses around the TeV scale and for sufficiently large lepton couplings to KK gauge bosons. Such large couplings can be compatible with ElectroWeak precision data on the Zff coupling in the framework of the custodial O(3) symmetry recently proposed, for specific configurations of lepton localizations (along the extra dimension). These configurations can simultaneously reproduce the correct lepton masses, while generating acceptably small Flavour Changing Neutral Current (FCNC) effects. This LHC phenomenological analysis is realistic in the sense that it is based on fermion localizations which reproduce all the quark/lepton masses plus mixing angles and respect FCNC constraints in both the hadron and lepton sectors.

15 pages, 6 Figures, Latex file

References in corpus (14)

• PYTHIA 6.4 Physics and Manual
• A custodial symmetry for Zbb
• Light custodians in natural composite Higgs models
• Warped Gravitons at the LHC and Beyond
• Probing the Randall-Sundrum geometric origin of flavor with lepton flavor violation
• Flavour physics of the RS model with KK masses reachable at LHC
• Kaluza--Klein excitations of gauge bosons at the LHC
• Resolving the A_{FB}^b puzzle in an extra dimensional model with an extended gauge structure
• A New Custodian for a Realistic Higgsless Model
• Next to Minimal Flavor Violation
• A Signal for a Theory of Flavor at the LHC
• Multi-W Events at LHC from a Warped Extra Dimension with Custodial Symmetry
• New physics from ultrahigh energy cosmic rays
• Top Pair Production in Randall-Sundrum Models

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• A Simple Flavor Protection for RS
• Constraining extra-fermion(s) from the Higgs boson data
• Minimal Flavor Violation in the Lepton Sector of the Randall-Sundrum Model
• Higgs production at the LHC in warped extra-dimensional models
• The effects of lepton KK modes on the lepton electric dipole moments in the Randall Sundrum scenario
• A Higgs in the Warped Bulk and LHC signals
• Rigorous treatment of the ${\mathcal{S}}^1/{\mathbb{Z}}_2$ orbifold model with brane-Higgs couplings
• Lepton flavor violating radion decays in the Randall-Sundrum scenario