Higgs boson production at large transverse momentum within the SMEFT: analytical results

Massimiliano Grazzini,Agnieszka Ilnicka,Michael Spira

doi:10.1140/epjc/s10052-018-6261-7

Massimiliano Grazzini, Agnieszka Ilnicka + Show 1 more

Open Access

https://doi.org/10.1140/epjc/s10052-018-6261-7

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Abstract

We consider Higgs boson production through gluon fusion at large transverse momentum in hadronic collisions. We present the analytic expressions of the relevant one-loop QCD amplitudes including the effects of the complete set of dimension-six operators. The latter correspond to modifications of the top and bottom Yukawa couplings, to an effective point-like Higgs coupling to gluons and to the chromomagnetic operator of the top quark. The quantitative impact of the chromomagnetic operator is also studied. Our results confirm previous findings that the effect of the chromomagnetic operator at high p_T can be large and should not be neglected.

Highlights

After the discovery of the scalar resonance of mass 125 GeV [1,2] the measurement of its properties is one of the main activities of the LHC program
In this work we recall the results for the LO Higgs production via gluon fusion and we extend our study [42] of the Higgs pT spectrum to include the effects of the chromomagnetic operator
In this work we studied Higgs boson production at large transverse momentum in gluon fusion within the Standard Model Effective Field Theory (SMEFT)

Summary

Introduction

After the discovery of the scalar resonance of mass 125 GeV [1,2] the measurement of its properties is one of the main activities of the LHC program. The mentioned studies usually omitted the effects of the chromomagnetic operator, but a dedicated work analysed its effect on the LO Higgs production [37]. In this work we recall the results for the LO Higgs production via gluon fusion and we extend our study [42] of the Higgs pT spectrum to include the effects of the chromomagnetic operator. We present the analytic expressions of the relevant one-loop QCD amplitudes including the effects of the complete set of dimension-six operators and we shortly illustrate the impact of the chromomagnetic operator on the high- pT tail of the spectrum. 2 we present the analytical results for the SMEFT one-loop QCD amplitudes in all partonic channels, and we briefly discuss the impact of the chromomagnetic operator at high pT.

Framework and LO results

Higgs plus jet production

Conclusions