Higher Dimensional Operators in the MSSM

TL;DR

This paper explores the role of higher dimensional operators in the MSSM, focusing on their effects on the Higgs sector and fermion interactions, with implications for LHC supersymmetry searches.

Contribution

It identifies the minimal set of dimension-five operators in the MSSM after supersymmetry breaking and analyzes their physical consequences.

Findings

Corrections to the MSSM Higgs sector.

Generation of 'wrong'-Higgs Yukawa couplings.

Implications for supersymmetry searches at the LHC.

Abstract

The origin and the implications of higher dimensional effective operators in 4-dimensional theories are discussed in non-supersymmetric and supersymmetric cases. Particular attention is paid to the role of general, derivative-dependent field redefinitions which one can employ to obtain a simpler form of the effective Lagrangian. An application is provided for the Minimal Supersymmetric Standard Model extended with dimension-five R-parity conserving operators, to identify the minimal irreducible set of such operators after supersymmetry breaking. Among the physical consequences of this set of operators are the presence of corrections to the MSSM Higgs sector and the generation of "wrong"-Higgs Yukawa couplings and fermion-fermion-scalar-scalar interactions. These couplings have implications for supersymmetry searches at the LHC.