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Higgs Boson Mass In GMSB with Messenger-Matter Mixing

Higgs Boson Mass In GMSB with Messenger-Matter Mixing. Abdelhamid Albaid. Wichita State University. BEACH 2012 July 23-28, 2012. Outline. Higgs Boson in Standard Model . Interesting Features of SUSY . Shortcomings of SUSY . Features of GMSB . Higgs Mass Bounds in minimal GMSB.

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Higgs Boson Mass In GMSB with Messenger-Matter Mixing

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  1. Higgs Boson Mass In GMSB with Messenger-Matter Mixing AbdelhamidAlbaid Wichita State University BEACH 2012 July 23-28, 2012

  2. Outline • Higgs Boson in Standard Model • Interesting Features of SUSY • Shortcomings of SUSY • Features of GMSB • Higgs Mass Bounds in minimal GMSB • The Objectives

  3. Outline • GMSB with Messenger-Matter Mixing • Improved Higgs Boson mass in • Froggatt-Nielsen Mechanism • Flavor Violation • Summary

  4. Higgs Boson in the Standard Model

  5. Supersymmetry (SUSY) is a promising scenario to solve the gauge hierarchy problem

  6. SUSY Spectrum • The minimal version of supersymmetry is MSSM

  7. SUSY Solves the instability in the Higgs mass As a consequence of supersymmetry Quadratic divergence will cancel

  8. Interesting Features of Supersymmetry • Gauge coupling unification MSSM GUT

  9. SU(5) GUT Model

  10. sets upper bound on the lightest Higgs mass < 130 GeV • has dark matter candidate • provides a natural mechanism for EWSB

  11. Shortcomings of MSSM • Many new free parameters: about 105 free parameters • New source of flavor violation (FV) Experimental upper bound • The degeneracy of the scalar fermion mass solves SUSY flavor problem

  12. Features of GMSB

  13. Features of GMSB

  14. Higgs Mass Bounds in minimal GMSB Observation of SM-like Higgs particle severely constrains minimal gauge mediation models Maximal Mixing Condition:

  15. Higgs Mass Bounds in minimal GMSB

  16. The Objectives To construct GMSB model with messenger-matter mixing • that raises the lightest Higgs mass to about 125 GeV • that leads to supersymmetric particles of around sub-TeV . The above objectives should be consistent with • flavor violation processes are suppressed in agreement with experiment . • the gravitino has a cosmological preferred sub-keV mass.

  17. GMSB with Messenger-Matter Mixing, Messenger scale

  18. GMSB with Messenger-Matter Mixing,

  19. GMSB with Messenger-Matter Mixing,

  20. GMSB with Messenger-Matter Mixing,

  21. Improved Higgs Boson mass in

  22. Froggatt-Nielsen Mechanism • U(1) flavor symmetry is assumed. • there is a SM singlet “ flavon” field • U(1) is broken at high scale by • The hierarchy of fermion masses and mixings can be explained as a power expansion of

  23. Froggatt-Nielsen Mechanism • Fermion mass hierarchy • Fermion mass mixing Agree with quark mixing angles Agree with neutrino mixing angles

  24. Flavor Violation • Mass Insertion Parameters: • Messenger matter mixing induces flavor violation The messenger-matter couplings reintroduce the flavor violation • Additional couplings are generated by the exotic Yukawa couplings.

  25. Summary • Higgs boson mass of order 125 GeV is naturally realized in GMSB with messenger matter mixing • Relatively light SUSY spectrum is obtained • FCNC processes are sufficiently suppressed in agreement with experiment

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