Testing Exotic Scalars with HiggsBounds

TL;DR

HiggsBounds is extended to test a broader class of BSM scalars, including those with non-hierarchical Yukawa couplings, by recasting experimental searches to general scalar models, enabling new physics constraints.

Contribution

The paper enhances HiggsBounds to handle arbitrary BSM scalars with couplings affecting search acceptances, broadening its applicability beyond standard assumptions.

Findings

Incorporated current LHC limits on exotic scalars.

Applied the method to dark matter mediator, flipped 2HDM, and R-parity violating SUSY.

Demonstrated the impact of experimental limits on these models.

Abstract

The program HiggsBounds is a well-established tool for testing Beyond-the-Standard Model (BSM) theories with an extended Higgs sector against experimental limits from collider searches at LEP, Tevatron and LHC. Thus far, it could be applied to any neutral or charged Higgs bosons originating from the modified Higgs sector. Implicitly, these particles were assumed to exhibit a somewhat hierarchical Yukawa structure as present in the Standard Model, where in particular the couplings to first generation fermions could be neglected. In this work, we extend the HiggsBounds functionalities to go beyond these restrictions, thus making the code applicable to any neutral or charged BSM scalars. Moreover, we develop a new approach to implement experimental searches whose kinematic acceptance depends significantly on the values of the involved couplings. We achieve this by recasting the searches to general scalar models. Using this approach we incorporate relevant current experimental limits from LHC searches for exotic scalars, and present the implications of these limits for a dark matter scalar mediator model, a flipped Two-Higgs-Doublet Model and a supersymmetric model with R-parity violation.