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Higgs Boson Mass Limit in GMSB with Messenger-Matter Mixing

Higgs Boson Mass Limit in GMSB with Messenger-Matter Mixing. Abdelhamid Albaid. In collaboration with. K. S. Babu. Pheno, 2011. Higgs Mass Bounds in the. Model. Outline. Introduction. Higgs Mass Bounds in MSSM. GMSB without messenger-matter mixing The objectives.

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Higgs Boson Mass Limit in GMSB with Messenger-Matter Mixing

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  1. Higgs Boson Mass Limit in GMSB with Messenger-Matter Mixing Abdelhamid Albaid In collaboration with K. S. Babu Pheno, 2011

  2. Higgs Mass Bounds in the Model Outline • Introduction • Higgs Mass Bounds in MSSM. • GMSB without messenger-matter mixing • The objectives • GMSB with Messenger-Matter Mixing • Flavor Violation • Conclusion

  3. Tree Level Excluded by LEP2 (114.4 GeV) 1-and 2- loop Introduction: Higgs Mass Bounds in MSSM

  4. Introduction: GMSB without Messenger-Matter Mixing FCNC are naturally suppressed Highly predictive Messenger- matter mixing with messenger fields belong to No, because can reproduce Universal Scalar Masses Features of GMSB Is it possible to obtain maximal mixing in the ordinary GMSB?

  5. 2- Messenger scale below is preferred by Cosmology. Introduction: The Objectives To construct GMSB model with messenger-matter mixing that 1- leads to a significant enhancement to the lightest Higgs mass compared to the ordinary GMSB. 2- leads to scalar mass spectra below 1 TeV. The above objectives should be consistent with 1- FV processes are suppressed in agreement with experiment .

  6. GMSB with Messenger-Matter Mixing The expressions for soft terms induced by messenger –matter mixing can be found in [ Giudice and Rattazi, 1998; Chacko and ponton, 2002 ]

  7. Higgs Mass Bounds in the Model There are three parameters:

  8. Higgs Mass Bounds in the Model

  9. Higgs Mass Bounds in the Model

  10. U(1) flavor symmetry is assumed. U(1) is broken at high scale by The hierarchy of the masses and mixing can be explained as power expansion of Flavor Violation Mass Insertion Parameters: The messenger-matter couplings reintroduce the flavor violation are generated by the exotic Yukawa couplings. Froggatt-Nielsen Mechanism:

  11. Flavor Violation Lopsided Structure

  12. Flavor Violation

  13. Consistent with cosmology preference GeV. This model can lead to the lightest Higgs mass of around 121 GeV with all superparticle masses below 1 TeV. These results are consistent with the gauge and exotic Yukawa couplings being perturbative and unified at the GUT scale as well as the FCNC being suppressed in agreement with experimental bounds. Conclusion The maximal mixing condition that leads to the upper limit of the lightest Higgs mass of MSSM is obtained in the model where the messenger fields belong to of SU(5).

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