Top Partners and Higgs Boson Production

Abstract

The Higgs boson is produced at the LHC through gluon fusion at roughly the Standard Model rate. New colored fermions, which can contribute to $gg\to h$, must have vector-like interactions in order not to be in conflict with the experimentally measured rate. We examine the size of the corrections to single and double Higgs production from heavy vector-like fermions in $SU(2{)}_L$ singlets and doublets and search for regions of parameter space where double Higgs production is enhanced relative to the Standard Model prediction. We compare production rates and distributions for double Higgs production from gluon fusion using an exact calculation, the low energy theorem (LET), where the top quark and the heavy vector-like fermions are taken to be infinitely massive, and an effective theory (EFT) where top mass effects are included exactly and the effects of the heavy fermions are included to $\mathcal{O}(1/M_X^2)$. Unlike the LET, the EFT gives an extremely accurate description of the kinematic distributions for double Higgs production.

37 pages, 11 figures. Minor changes to Figs. 8-11

References in corpus (8)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Light custodians in natural composite Higgs models
• Composite Higgs-Mediated FCNC
• Electroweak Precision Constraints on Vector-like Fermions
• Search for pair produced fourth-generation up-type quarks in pp collisions at sqrt(s) = 7 TeV with a lepton in the final state
• Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at sqrt(s) = 7 TeV
• New Physics from the Top at the LHC

Cited by in corpus (10)

• Top-quark mass effects in double and triple Higgs production in gluon-gluon fusion at NLO
• Exploring Resonant di-Higgs production in the Higgs Singlet Model
• Higgs boson pair production in the D=6 extension of the SM
• What's in the Loop? The Anatomy of Double Higgs Production
• LHC Phenomenology of Type II Seesaw: Nondegenerate Case
• Measuring the 2HDM Scalar Potential at LHC14
• Invisible Decays in Higgs Pair Production
• Impact of top-Higgs couplings on di-Higgs production at future colliders
• Search for single production of the vector-like top partner at the 14 TeV LHC
• Search for single production of the heavy vectorlike $T$ quark with $T\to th$ and $h\to \gamma \gamma$ at the high-luminosity LHC