# Higgs 2022

Nov 7 – 11, 2022
Pisa
Europe/Rome timezone
There is a live webcast for this event.

## Constraining SMEFT four-quark operators via Higgs+jet production at NLO

Nov 8, 2022, 9:00 AM
15m
Sala Azzurra (Palazzo della Carovana)

### Sala Azzurra

#### Palazzo della Carovana

Effective Field Theory

### Description

Higgs data can provide better constrains on some top quark operators than top data. Since in Higgs observables various SMEFT operators enter, differential Higgs data might prove useful in global fits including those operators. In addition, such analysis could shed light on the chiral structure of the (eventual) heavy new physics beyond the Standard Model.
We calculate the dominant contributions of third generation four-quark operators to Higgs+jet production. They enter via loop corrections
to the (partonic) processes $gg\to gH$, $q\bar{q} \to gH$, $q(\overline{q})g\to q(\bar{q})H$, whose dominant Standard Model amplitude arises at one-loop level. Consequently, the inclusion of NLO ($\mathcal{O}\left(1/\Lambda^2\right)$) contributions to these processes requires a two-loop computation.
Our analysis consists in computing the matrix elements and, subsequently, the (hadronic) cross section via Monte Carlo integration. Finally we perform a fit to put bounds on the considered SMEFT coefficients.

Type of talk Theory