Universality test of the charged Higgs boson couplings at the LHC and at B factories

TL;DR

This paper investigates the potential to test the universality of charged Higgs boson couplings at the LHC and B-factories, focusing on large tan(beta) scenarios, and demonstrates that combined measurements can achieve high-precision coupling tests.

Contribution

It provides a model-independent analysis of charged Higgs couplings at the LHC and B-factories, proposing a method to test their universality through combined measurements.

Findings

Couplings to third-generation quarks can be measured with 10% accuracy at high luminosity.

Combining LHC and B-factory data enables a universality test of charged Higgs couplings.

The study is applicable for large tan(beta) scenarios in two Higgs doublet models.

Abstract

Many extensions of the Standard Model (SM) of particle physics predict the existence of charged Higgs bosons with substantial couplings to SM particles, which would render them observable both directly at the LHC and indirectly at B-factories. For example, the charged Higgs boson couplings to fermions in two doublet Higgs models of type II, are proportional to the ratio of the two Higgs doublet vacuum expectation values (tan(beta)) and fermionic mass factors and could thus be substantial at large tan(beta) and/or for heavy fermions. In this work we perform a model-independent study of the charged Higgs boson couplings at the LHC and at B-factories for large values of tan(beta). We have shown that at high luminosity it is possible to measure the couplings of a charged Higgs boson to the third generation of quarks up to an accuracy of 10%. We further argue that by combining the possible measurements of the LHC and the B-factories, it is possible to perform a universality test of charged Higgs boson couplings to quarks.