Effects of the anomalous Higgs couplings on the Higgs boson production at the Large Hadron Collider

TL;DR

This paper investigates how dimension-six operators affect Higgs production rates at the LHC, highlighting potential enhancements in double-Higgs production due to new physics modifying top-Higgs couplings.

Contribution

It analyzes the impact of dimension-six operators on Higgs production, especially double-Higgs, providing insights into new physics effects on top-Higgs interactions.

Findings

Double-Higgs production can be significantly enhanced by dimension-six operators.

Modifications to the top-Yukawa coupling influence Higgs production cross sections.

Potential to extract new physics information from LHC data on Higgs processes.

Abstract

We study the impact of dimension-six operators on single- and double-Higgs production rates via gluon fusion at the Large Hadron Collider (LHC). If the top-Yukawa coupling is modified by some new physics whose scale is of the TeV scale, its effect changes the cross sections of single-Higgs production $gg\to H$ and double-Higgs production $gg\to HH$ through the top-loop diagram. In particular, double-Higgs production can receive significant enhancement from the effective top-Yukawa coupling and the new dimension-five coupling $t{\bar t}HH$ which are induced by the dimension-six operator. Comparing these results to the forthcoming data at the LHC, one can extract information of the dimension-six operators relevant to the top quark and the Higgs boson.