Higgs couplings in the MSSM at large tan(beta)

TL;DR

This paper analyzes tan(beta)-enhanced quantum effects in the MSSM by matching it to an effective 2HDM, providing analytic expressions and numerical insights into Higgs-sector effects at large tan(beta).

Contribution

It introduces a method to compute tan(beta)-enhanced effects in the MSSM, clarifies their dependence on renormalization schemes, and compares Higgs-sector contributions to Yukawa couplings.

Findings

Higgs-sector effects are generally larger than wrong-Higgs Yukawa contributions.

Provides analytic formulas for Yukawa and Higgs interactions at large tan(beta).

Numerical analysis shows significant Higgs-sector impact in parameter scans.

Abstract

We consider tan(beta)-enhanced quantum effects in the minimal supersymmetric standard model (MSSM) including those from the Higgs sector. To this end, we match the MSSM to an effective two-Higgs doublet model (2HDM), assuming that all SUSY particles are heavy, and calculate the coefficients of the operators that vanish or are suppressed in the MSSM at tree-level. Our result clarifies the dependence of the large-tan(beta) resummation on the renormalization convention for tan(beta), and provides analytic expressions for the Yukawa and trilinear Higgs interactions. The numerical effect is analyzed by means of a parameter scan, and we find that the Higgs-sector effects, where present, are typically larger than those from the "wrong-Higgs" Yukawa couplings in the 2HDM.