Light-quarks Yukawa couplings and new physics in exclusive high-pT Higgs boson + jet and Higgs boson + b-jet events

摘要

We suggest that the exclusive Higgs + light (or b)-jet production at the LHC, pp → h + j(j_b), is a rather sensitive probe of the light-quarks Yukawa couplings and of other forms of new physics (NP) in the Higgs-gluon hgg and quark-gluon qqg interactions. We study the Higgs pT-distribution in pp → h + j(j_b) → γγ + j(j_b), i.e., in h + j(j_b) production followed by the Higgs decay h → γγ, employing the (pT-dependent) signal strength formalism to probe various types of NP which are relevant to these processes and which we parametrize either as scaled Standard Model (SM) couplings (the kappaframework) and/or through new higher dimensional effective operators (the SMEFT framework). We find that the exclusive h + j(j_b) production at the 13 TeV LHC is sensitive to various NP scenarios, with typical scales ranging from a few TeV to O(10) TeV, depending on the flavor, chirality and Lorentz structure of the underlying physics.