# Light-quarks Yukawa couplings and new physics in exclusive high-$p_T$ Higgs + jet and Higgs + $b$-jet events

## TL;DR

This paper investigates how exclusive Higgs plus jet events at the LHC can serve as sensitive probes for light-quark Yukawa couplings and new physics, using the Higgs pT distribution and effective field theory frameworks.

## Contribution

It introduces a novel approach to constrain light-quark Yukawa couplings and new physics through exclusive Higgs + jet production analysis at 13 TeV LHC.

## Key findings

- Sensitive to new physics scales from a few TeV to 10 TeV
- Probes flavor, chirality, and Lorentz structure of NP
- Employs Higgs decay to gamma gamma for analysis

## 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.