1 / 18

Flavour violation in ``minimal'' SUSY SU(5) models

Flavour violation in ``minimal'' SUSY SU(5) models. 10 October, 2006 @CERN. Toshifumi Yamashita ( SISSA ). In preparation. with F. Borzumati (SISSA & ICTP) S. Mishima (Princeton). + mass. SU(5) & SM breaking part is unchanged.

gigi
Download Presentation

Flavour violation in ``minimal'' SUSY SU(5) models

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Flavour violation in ``minimal'' SUSY SU(5) models 10 October, 2006 @CERN Toshifumi Yamashita (SISSA) In preparation. with F. Borzumati (SISSA & ICTP) S. Mishima (Princeton)

  2. + mass SU(5) & SM breaking part is unchanged. ``minimal'' SUSY SU(5) “ ” • minimal SUSY SU(5) + possible non-renormalizable terms

  3. Plan • Introduction • Problems of GUTs & Solutions • Analysis • Summary Double-Triplet Splitting Fermion Spectra Proton Decay

  4. Yukawa LFV Introduction • LFV vs. QFV in SUSY-GUTs Type II Type I F. Borzumati & A. Masiero (1986) A. Rossi (2002)

  5. Yukawa LFV QFV Introduction • LFV vs. QFV in SUSY-GUTs Type II Type I Dependence? Grand Unification realistic?? T. Moroi (2000) Double-Triplet Splitting Fermion Spectra Proton Decay New Physics above GUT

  6. LFV QFV LFV QFV Introduction • Type I vs. Type II Seesaw “Minimal Ansatz” Decoupling Type I > Type II ～

  7. SUSY? Problems of GUTs & Solutions Higgs? Wrong relation? • SUSY-GUT • fascinating extension of SM • gauge coupling unification (GCU) unifications of forces and of matter stabilization of the weak scale Proton decay?

  8. Problems of GUTs & Solutions • SUSY-GUT • The Hierarchy problem is solved. • Gauge Coupling Unification But ・・・ • DT Splitting problem • Proton decay (vs. GCU) • Fermion Yukawa • SUSY flavor problem Minimal Ansatz LFV QFV

  9. Problems of GUTs & Solutions • DT Splitting problem Fine-turning of 1014!!

  10. Problems of GUTs & Solutions • Solutions for DTS problem • In Xtra Dim. • Sliding Singlet mechanism • Dimopoulos-Wilczek mechanism • GIFT mechanism • Missing Partner mechanism 4D SU(5) Non-Perturbative below Mp.

  11. Lower cutoff scale!! Problems of GUTs & Solutions • Low Scale Gravity Mediation H.Itoh, N.Okada & T.Y. (2006) H If Gravity mediation with the Minimal Ansatz. Gravitino LSP (SuperWIMP).

  12. Problems of GUTs & Solutions • Solutions for DTS problem • In Xtra Dim. • Sliding Singlet mechanism • Dimopoulos-Wilczek mechanism • GIFT mechanism • Missing Partner mechanism 4D SU(5) Non-Perturbative below Mp.

  13. Problems of GUTs & Solutions • Solutions for DTS problem • In Xtra Dim. • Sliding Singlet mechanism • Dimopoulos-Wilczek mechanism • GIFT mechanism • Missing Partner mechanism 4D SU(5) • Fine-tuning SU(5) minimal Not natural, but technically natural. It is true for both & . Y.Kawamura, H.Murayama & M.Yamaguchi (1995)

  14. NRO can suppress only Yukawa of . Problems of GUTs & Solutions • Fermion Spectrum Wrong GUT relation: Non-Renormalizable Operators GUT breaking Little effects on RGE New mixing in Flavor • Proton Decay is allowed. D.E. Costa & S. Wiesenfelds (2003)

  15. Analysis • Parameters & Benchmark values We change Mcutoff . 16 GUT parameters : MGUT = MC = 2×10 GeV Seesaw parameters : Type I : Type II: Low energy parameters : : NH, SUSY parameters :

  16. Analysis 15 • Results : Mseesaw =10 GeV Type II Type I

  17. Analysis 12 • Results : Mseesaw =10 GeV (Type II)

  18. Summary • We investigate LFV & QFV in “minimal” SU(5) models with Type I / TypeII seesaw. • Cutoff dependence: Type I : sensitive Type II: QFV/LFV is insensitive • dependence : quite small Future works More exhaustive scan. Phenomenological constraints More natural model : MP, SO(10)…

More Related