A phenomenological study on the production of Higgs bosons in the cSMCS model at the LHC

TL;DR

This paper predicts Higgs boson production rates in an extended Standard Model with a complex singlet, using QCD calculations, and compares results with experimental data to validate the approach.

Contribution

It introduces a phenomenological analysis of Higgs production in the cSMCS model using effective LO QCD and UPDF, providing new predictions and comparisons with existing data.

Findings

The framework accurately reproduces SM Higgs production cross-sections.

Predictions for Higgs production in cSMCS are consistent with current experimental data.

The model's scalar spectrum includes three neutral Higgs particles, with the 125 GeV Higgs being SM-like.

Abstract

In the present work, we intend to predict the production rates of the Higgs bosons in the simplest extension of the Standard Model (SM) by a neutral complex singlet (cSMCS). This model has an additional source of CP violation and provides strong enough first-order electroweak phase transition to generate the baryon asymmetry of universe (BAU). The scalar spectrum of the cSMCS includes three neutral Higgs particles with the lightest one considered to be the 125 GeV Higgs boson found at LHC. The SM-like Higgs boson comes mostly from the SM-like SU(2) doublet, with a small correction from the singlet. To predict the production rates of the Higgs bosons, we use a conventional effective LO QCD framework and the unintegrated parton distribution functions (UPDF) of Kimber-Martin-Ryskin (KMR). We first compute the SM Higgs production cross-section and compare the results to the existing theoretical calculations from different frameworks as well as the experimental data from the CMS and ATLAS collaborations. It is shown that our framework is capable of producing sound predictions for these high-energy QCD events in the SM. Afterwards we present our predictions for the Higgs boson production in the cSMCS.