1 / 35

A Two Particle SUSY/ Flavor Perspective on CPV in B → f K S

A Two Particle SUSY/ Flavor Perspective on CPV in B → f K S. December 15, 2003 @ 6 th ACFA LC Workshop. Prologue: Is there a Link btwn LC and B?. Super B Upgrade Does Take Aim at SUSY Effects !. But. Could B Factory Impact on Tevatron/LHC/LC !?.

gallia
Télécharger la présentation

A Two Particle SUSY/ Flavor Perspective on CPV in B → f K S

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. A Two Particle SUSY/FlavorPerspective onCPV in B → fKS December 15, 2003 @ 6th ACFA LC Workshop

  2. Prologue:Is there a Link btwn LC and B? • Super B Upgrade Does Take Aim at SUSY Effects ! But ... • Could B Factory Impact on Tevatron/LHC/LC !? George W.S. Hou

  3. Introduction: Intuitive Grasp of SfKsData* *Cheon’s talk George W.S. Hou

  4. World Average sin2f1eff (fKS) = -0.39±0.41 2002 158 fb-1: sin2f1eff (fKS) = -0.15±0.33 2003 250 fb-1: Still 2.7s from 0.73 (~ 2002) Large,NewPhysics,b → s CPVEffect • Large Effective s-b Mixing • NewCPV Phase • Right-handed Interaction [to getsin2f1eff (h’KS) ~ sin2f1] Call for Synergies of Flavor & SUSY ? George W.S. Hou

  5. Penguins (Vertex Loops) Real SM (KM) Prediction SfKS= sin2f1 b Possible SUSY FCNC/CPV Loop George W.S. Hou

  6. Framework • (approximate) Abelian Flavor Symmetry ⊕ SUSY AFS Has Right-handed s-b Mixing SUSY Brings in Right-handed Dynamics • AFS Model Pre-existed Nir-Seiberg, PLB’93; Leurer-Nir-Seiberg, NPB’94 • More Definite, yet Generic, Model Context ⇨ Constraints/Predictions ⇦ Has All Ingredients George W.S. Hou

  7. Abelian Flavor Symmetry and SUSY? George W.S. Hou

  8. Prominent AFS: Independently Well Motivated Mass/Mixing Hierarchy Diag: Mass Up-right: VCKM Abelian Flavor Symmetry Commuting Charges but right-handed Nir-Seiberg, PLB’93; Leurer-Nir-Seiberg, NPB’94 N.B. Need 4 Texture Zeros(Chua-WSH, PRL’01) : Set [..] = 0 Arhrib-Chua-WSH, PRD’01Decouple d flavor Alternative Picture: Chang, Masiero, Murayama GUT George W.S. Hou

  9. Assume Right-handed QuarksInert in SM  Right-handedSquarks SUSY also important RR Sector Impact b ⇄s thru SUSY George W.S. Hou

  10. Level Splitting by Large Mixing Drive One State Light strange-beauty squark 1 CP Phase 100 GeV Possible Focus on 200 GeV George W.S. Hou

  11. Why TeV Scale SUSY? • Large Flavor Violation (s-b) • ⇔ Stringent Low Energy Constraints Chua-WSH, hep-ph/0110106 George W.S. Hou

  12. Facing B Data Arhrib-Chua-WSH, PRD’01 Chua-WSH-Nagashima, hep-ph/0308298 George W.S. Hou

  13. A Little Note on Formalism … • Besides O1,2Tree • O3-6Strong Penguin • O7-10EM/EW Penguin • alsoO11,12g/g Dipole Matrix Elements evaluated via Naïve Factorization George W.S. Hou

  14. B → fKs,h’Ks Rates 1, 0.5 TeV 2, 0.5 1, 0.8 TeV 2, 0.8 First, Rate Constraints • Survive b → sg Constraint More Conservative • fKs Rate “Sees Red” • Cannot Account for h’Ks Rate • Not a New Problem • Combine b → s g and B → fKs • → s ~ p/2,3p/2 ? George W.S. Hou

  15. Tuning for SfKs ≲ 0,Sh’Ks~ SyKs Possible • SfKs≲ 0 prefers lower s-plane • ➯ Sh’Ks≅sin2FBd as well ! • Lower gluino masslowers SfKs • Hadronic Parameters • CP phase enters B → fKs via • Lower q2, and/or larger • ➯Larger |SfKs | • ∴ Prefer to keep gluino mass • above 500 GeV (L.E. Constraints) • Could s ≲p/2be it? 0.5 TeV Preferred Noticed also by Khalil & Kou [Murayama et al.] George W.S. Hou

  16. A Two(Three)-particle SUSY/Flavor Model? George W.S. Hou

  17. The Upshot? Two-Particle SUSY Model • Why TeV Scale SUSY? • Large Flavor Violation (s-b) • ⇔ Stringent Low Energy Constraints • In fact, all other SUSY particles a “nuisance”:), • hence pushed high. • TeV Scale SUSY w/ Strange-beauty Squark • “Light” Particles: ≲ 200 GeV • ≳ (≲?) 500 GeV • likely LSP? • unlikely ~ TeV George W.S. Hou

  18. Generic Squark Bounds Allowed George W.S. Hou

  19. b , s ∴ (bb+sb+bs+ss) Diluted George W.S. Hou

  20. ~ 200 GeV ~ 500 GeV Collider Study w/ Kingman Cheung George W.S. Hou

  21. Cross Sections at Tevatron ~ 0.1-1 pb ≲ 0.01 pb A few hundred events at few fb−1 George W.S. Hou

  22. Somewhat forward More massive event Cross Sections at LHC Now Dominant Both ~ 10 pb Distinct, probe s → b George W.S. Hou

  23. Cross Sections at LC ~ 10 fb George W.S. Hou

  24. Detection • Basically, just a light “b”-squark in Production • so, Discovery not a problem. • Question is Decay: bino LSP • or gravatino • Can be Stable? (LSP) To be studied ... But, need Good b-tagging ! [s-tagging?] George W.S. Hou

  25. Conclusion • SfKs,Sh’Ks Data (May) Call for - Large s-b Mixing, w/ New CPV Phase - New Right-handed Interaction • Hint at a Light Flavor-mixed Squark? Independtly Well Motivated (Flavor & SUSY) • Survive b → sg, Account for SfKs ≲ 0,Sh’Ks>0 • Wait for Confirmation at B Factory [⇨SuperB] B Factory Could Impact on Tevatron/LHC/LC ! ➯ Study Collider Aspect Nonstandard, Flavorful TeV SUSY w/ light Strangebeauty CP Phase !? George W.S. Hou

  26. Backup Slides … George W.S. Hou

  27. 2002 Status of New Phases in b s Penguins 3

  28. Belle B → fKS :2002 vs2003 sin2f1eff (fKS) = -0.73±0.64±0.22 78 fb-1: sin2f1eff (fKS) = -0.96±0.50 140 fb-1: +0.09 -0.11 • Results stronger, but consistent (~ doubling of data) • 3.5sfromsin2f1 = 0.73 • Statistics dominated • 2002: published (PRD’03) • 2003: submitted to PRL (8/03), accepted 11/03 George W.S. Hou

  29. BaBar 2003:B →fKS Systematic Issues sin2f1eff (fKS) = -0.18±0.51±0.09 81 fb-1: sin2f1eff (fKS) = +0.45±0.43±0.07 110 fb-1: consistent w/ 0.73 Data size increased and was reprocessed. Extensive checks with data and Toy MC. The large change is attributed to a 1σ statistical fluctuation. New 29 fb-1 : Gives > +1 !! Browder @ LP03 George W.S. Hou

  30. Prominent AFS: Independently Well Motivated Mass/Mixing Hierarchy Diag: Mass Up-right: VCKM Abelian Flavor Symmetry Commuting Charges Nir-Seiberg, PLB’93; Leurer-Nir-Seiberg, NPB’94 but right-handed N.B. Need 4 Texture Zeros(Chua-WSH, PRL’01) : Set [..] = 0 Arhrib-Chua-WSH, PRD’01Decouple d flavor Alternative Picture: Chang, Masiero, Murayama GUT George W.S. Hou

  31. Amplitudes V∓ A Reason behind Opposite Trend in SfKs vsSh’Ks George W.S. Hou

  32. Situation forBsMixing and New Prospect for SK*0g George W.S. Hou

  33. Consequences: DmBs, sin2FBs Tough (!?) Take s ≲ p/2as example • Lighter gluino ~500 GeV Needed • - DmBs > 70ps-1Tough ! • - sin2FBs ~0 - 1 Tough ? • Would’ve preferred heavier gluino • but for … SfKs ≲ 0 • For lighter gluino, • periodicity change • ∵ • a-term dominant(two exch.) • 100 GeV ? • ~ 200 GeV case • Except, Easier Direct Detection ! George W.S. Hou

  34. Experimental Prospects for DmBs CDF Cannot Observe (already optimistic) What about LHCb/BTeV ? Nakada: Can; but CPV Program for Bs Diificult? George W.S. Hou

  35. Implications: Wrong Helicity Photon inb → sgL • Strength of Mixing-dep. CPV • Test gL component • (Atwood, Gronau, Soni, 1997) • SKsp0g nowPromising • Free from Hadronic Uncert. • In contrast, Bs→ f g • probably washed out • Can also test gL comp. via • LPolarization in Lb→ Lg • (Mannel, Recksiegel, 1997) George W.S. Hou

More Related