Abstract
We suggest that the exclusive Higgs + light (or b)-jet production at the LHC, $pp \to h+j(j_b)$, 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 $p_T$-distribution in $pp \to h+j(j_b) \to \gamma \gamma + j(j_b)$, i.e., in $h+j(j_b)$ production followed by the Higgs decay $h \to \gamma \gamma$, employing the ($p_T$-dependent) signal strength formalism to probe various types of NP which are relevant to these processes and which we parameterize either as scaled Standard Model (SM) couplings (the kappa-framework) 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 ${\cal O}(10)$ TeV, depending on the flavor, chirality and Lorentz structure of the underlying physics.
Highlights
The runs of the LHC will be dedicated to two primary tasks: the search for new physics (NP) and the detailed scrutiny of the Higgs properties, which might shed light on NP related to the origin of mass and flavor and to the observed hierarchy between the two disparate Planck and electroweak (EW) scales
We find that the exclusive pp → h þ jðjbÞ signal can probe the NP scenarios portrayed by the SMEFT with typical scales ranging from a few to Oð10Þ TeV, depending on the details of underlying physics
We have examined the effects of various NP scenarios, which entail new forms of effective qqh and qqg interactions in conjunction with beyond the Standard Model (SM) Higgs-gluon effective coupling, in exclusive Higgs þ light-jet and Higgs þ b-jet production at the LHC
Summary
The runs of the LHC will be dedicated to two primary tasks: the search for new physics (NP) and the detailed scrutiny of the Higgs properties, which might shed light on NP related to the origin of mass and flavor and to the observed hierarchy between the two disparate Planck and electroweak (EW) scales. A significant effort has been dedicated in recent years, from the theory side, towards understanding and reducing the uncertainties pertaining to the Higgs þ jet production cross section at the LHC [7,8,10,11,12,13,20,21,22], with special attention given to higher transverse momentum of the Higgs, where NP effects are expected to become more apparent.
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