Angular Correlations in Associated Production of Single Top and Higgs with and without anomalous $Wtb$ Couplings

TL;DR

This paper investigates angular correlations and top quark polarization in single top and Higgs production at the LHC, analyzing the impact of anomalous Wtb couplings and the robustness of observables against various theoretical uncertainties.

Contribution

It provides a detailed analysis of angular correlations and polarization in single top-Higgs production, including effects of anomalous Wtb couplings and robustness checks against uncertainties.

Findings

Angular correlation is insensitive to Higgs mass variations within 3 GeV.

Angular correlation remains robust against changes in collision energy, PDFs, and factorization scale.

The process shows sensitivity to anomalous Wtb couplings, useful for new physics searches.

Abstract

We study the angular correlation and the amount of top quark polarization in the production of a higgs boson in association with a single top quark in the $t-$channel at the LHC. We also study the effect of anomalous $Wtb$ couplings on the angular correlation and on the production cross section of the process. The cross section and angular correlation is almost insensitive to the variation of the Higgs boson mass within 3 GeV. The robustness of the angular correlation against the center-of-mass energy of the proton-proton collision, the variation of parton distribution functions, and the change of factorization scale is investigated. The sensitivity of this process to the anomalous couplings is examined.