Anomalous gauge couplings of the Higgs boson at the CERN LHC: Semileptonic mode in WW scatterings

TL;DR

This paper investigates the potential to detect anomalous gauge couplings of the Higgs boson at the LHC using semileptonic WW scattering modes, demonstrating comparable sensitivity to leptonic modes with reduced luminosity requirements.

Contribution

It provides a comprehensive tree-level analysis of semileptonic WW scattering signatures for anomalous Higgs couplings, including background suppression and sensitivity estimates.

Findings

Semileptonic mode reduces luminosity needs by a factor of 3.

Sensitivity comparable to pure leptonic mode.

Test for anomalous couplings feasible with 50 fb⁻¹ if couplings are large.

Abstract

We make a full tree level study of the signatures of anomalous gauge couplings of the Higgs boson at the CERN LHC via the semileptonic decay mode in WW scatterings. Both signals and backgrounds are studied at the hadron level for the Higgs mass in the range 115 GeV to 200 GeV. We carefully impose suitable kinematical cuts for suppressing the backgrounds. To the same sensitivity as in the pure leptonic mode, our result shows that the semileptonic mode can reduce the required integrated luminosity by a factor of 3. If the anomalous couplings in nature are actually larger than the sensitivity bounds shown in the text, the experiment can start the test for an integrated luminosity of 50 inverse fb.