$Hb\bar{b}$ production in Composite Higgs Models

Abstract

New vector-like quarks with electric charge 2/3 and -1/3 can be singly produced at hadron colliders through the exchange of a color octet vector resonance in models of strong electroweak symmetry breaking. We show that electroweak symmetry breaking effects can have a significant impact on the decay pattern of these new quarks. In particular, single production of charge -1/3 fermion resonances, mediated by a color octet vector resonance, typically results in an $Hb\bar{b}$ final state with a sizeable cross section and very distinctive kinematics. We consider the leading $H\to b\bar{b}$ decay and show that the $4b$ signal can be very efficiently disentangled from the background: heavy octet masses of up to 3 TeV can be tested with the data already collected at the LHC and up to 5 TeV with an integrated luminosity of 100 fb${}^{-1}$ at $\sqrt{s}=14$ TeV. We also discuss the kinematical differences between the $Hb\bar{b}$ production in models of strong electroweak symmetry breaking and supersymmetric models and the implications on the phenomenology of non-minimal composite Higgs models.

29 pages, 16 figures

References in corpus (13)

• PYTHIA 6.4 Physics and Manual
• A custodial symmetry for Zbb
• Light custodians in natural composite Higgs models
• Boosted objects: a probe of beyond the Standard Model physics
• Beyond the Minimal Composite Higgs Model
• Light Kaluza-Klein States in Randall-Sundrum Models with Custodial SU(2)
• The Higgs boson from an extended symmetry
• Implications of a Light Higgs in Composite Models
• Heavy Quarks Above the Top at the Tevatron
• Collider Phenomenology of Gauge-Higgs Unification Scenarios in Warped Extra Dimensions
• Vector-like quarks in a composite Higgs model
• Early discovery of top partners and test of the Higgs nature
• Tau Custodian searches at the LHC

Cited by in corpus (9)

• A handbook of vector-like quarks: mixing and single production
• Mixing with vector-like quarks: constraints and expectations
• Vector-like Bottom Quarks in Composite Higgs Models
• New leptons with exotic decays: collider limits and dark matter complementarity
• Top Partners Searches and Composite Higgs Models
• Z-peaked excess from heavy gluon decays to vector-like quarks
• Search for single production of a vector-like quark via a heavy gluon in the $4b$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
• On the behaviour of composite resonances breaking lepton flavour universality
• Sensitivity to the Single Production of Vector-Like Quarks at an Upgraded Large Hadron Collider