VTI Seminars

The wrong-Higgs Couplings of the MSSM

by Howard Haber

Europe/Berlin
http://evo.caltech.edu/evoGate/koala.jnlp?meeting=eneueMvlvsaia2I8alIn

http://evo.caltech.edu/evoGate/koala.jnlp?meeting=eneueMvlvsaia2I8alIn

Phone Bridge ID: 380539
Description
Abstract: In models of weak-scale supersymmetry, one can integrate out heavy states (messengers, heavy superpartners, etc.) to to obtain an effective broken-supersymmetric low-energy Lagrangian. This Lagrangian can contain dimension-four gauge invariant Higgs interactions that violate supersymmetry (SUSY). The "wrong-Higgs" Yukawa couplings generated by one-loop radiative corrections in the limit of heavy squarks and gluinos are a well known example of this phenomenon. Likewise, it is possible to generate gaugino--higgsino--Higgs boson interactions that violate supersymmetry. Such wrong-Higgs gaugino couplings can arise in models of gauge-mediated SUSY-breaking in which some of the messenger fields couple to the MSSM Higgs bosons. In regions of parameter space where the messenger scale is low and \tan{\beta} is large, these hard SUSY-breaking operators yield \tan{\beta}-enhanced corrections to tree-level supersymmetric relations in the chargino and neutralino sectors. As an example, I demonstrate how physical observables in the chargino sector can be used to isolate the \tan\beta-enhanced effects derived from the wrong-Higgs gaugino operators.
Slides