Searching for heavy charged Higgs bosons in the neutrino-tau decay mode at LHC

TL;DR

This paper explores the potential to discover heavy charged Higgs bosons in the tau-neutrino decay mode at the LHC, highlighting its advantages over traditional channels and outlining the conditions for successful detection across a broad parameter space.

Contribution

It presents a detailed analysis of searching for heavy charged Higgs bosons in the tau-nu decay channel at the LHC, emphasizing its feasibility and sensitivity in large tan(beta) regions.

Findings

Discovery potential for H± masses >200 GeV up to 1 TeV.

Sensitivity to tan(beta) down to approximately 1.5 with improved signal efficiency.

Reduced QCD background enhances the channel's feasibility.

Abstract

We discuss the search for the heavy charged Higgs bosons H^\pm, implicitly of the Minimal Supersymmetric Standard Model, in the tau-nu decay mode at the LHC. Compared to the dominant decay mode H^\pm\to bt, the channel suffers from suppression due to the branching ratio and the lack of direct mass reconstruction, but the reduced QCD background makes it a feasible channel especially in the large tan(beta) region. We study the production in `bt fusion' via bg\to tH^-, and the leading irreducible background bg\to tW^-. Our results indicate that for the H^\pm mass of greater than 200 GeV and up to 1 TeV and higher, they can be discovered in this channel for a vast range of the parameter space, down to at least tan(beta)\sim3 and potentially the whole range of tan(beta) down to 1.5 if the signal selection efficiency can be improved fourfold. Our analysis is sensitive to top quark identification at large rapidity, and should be supplemented with a full study including jet showering and detector effects.