Nov 7 – 11, 2022
Europe/Rome timezone
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Constraining SMEFT four-quark operators via Higgs+jet production at NLO

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

Sala Azzurra

Palazzo della Carovana

Effective Field Theory Tuesday Session B


Stefano Di Noi (Università di Padova and INFN, Sezione di Padova)


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

Primary authors

Ramona Groeber (Università di Padova and INFN, Sezione di Padova) Stefano Di Noi (Università di Padova and INFN, Sezione di Padova)

Presentation materials