Why is SUSY Breaking so Difficult?! - Institute for Particle Physics ...

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Other Useful ToolsThe Model-building ToolkitSpectrum calculators:SoftSusy — C++SPheno — F90SuSpect — FORTRANISAJET — F77Monte Carlo Event Generators:HERWIG++SherpaPYTHIAOther stuff:CPsuperH — MSSM Higgs Pheno with CP violationmicrOMEGAs — SUSY DM Relic Density calculatorFor a comprehensive list, see:www.ippp.dur.ac.uk/montecarlo/bsm(I.P.P.P. — Durham University) SUSY Breaking Heidelberg 23 / 27
SummaryWhy Supersymmetric Model Building is DifficultIn general SUSY doesn’t like being broken◮ Witten Index◮ Nelson–Seiberg ArgumentMSSM breaking has 105 new parameters!Very little is actually known about the relation between SUSY andthe real world (same for all BSM physics). Hopefully this willchange soon!There are tools to help make this connection(I.P.P.P. — Durham University) SUSY Breaking Heidelberg 24 / 27
Page 2 and 3: Outline1 Introduction and Motivatio
Page 5 and 6: Why Supersymmetry?It’s personalCo
Page 7 and 8: The Language of SUSYLagrangiansKine
Page 9: R-symmetryWhat is it?It’s a globa
Page 14 and 15: Breaking SupersymmetryIt has to be
Page 16 and 17: Witten IndexSUSY vacua are easy to
Page 18 and 19: Nelson & SeibergR-symmetry causing
Page 20 and 21: Mediating SUSY BreakingBreaking the
Page 22 and 23: Radiative Electroweak Symmetry Brea
Page 26 and 27: Suggested ReadingNiceModern Supersy
Page 28: Other NicetiesWhat has SUSY ever do

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