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B →φ K s in vector-like quark model

Masato Senami (ICRR, the University of Tokyo). B →φ K s in vector-like quark model. K. Higuchi, MS and K. Yamamoto in preparation. Contents. Contents. 1. Introduction 2. Model electric dipole moment 3. B →φ K s 4. Summary. Introduction. Motivation. CP violation in

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B →φ K s in vector-like quark model

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  1. Masato Senami (ICRR, the University of Tokyo) B→φKs in vector-like quark model K. Higuchi, MS and K. Yamamoto in preparation

  2. Contents Contents 1. Introduction 2. Model electric dipole moment 3. B →φKs 4. Summary

  3. Introduction Motivation • CP violation in • Standard Model • New physics beyond the Standard model? vector-like down type quark

  4. Model Vector-like down type quark model E6 GUT • Vector-like down type quark + Higgs singlet S SU(2) singlet, U(1) → ±1/3 mass term for vector-like quark d-D quark mixing

  5. Model Flavor mixing no mixing • Flavor mixing Z: weak basis → mass basis Higgs: ξ: neutral Higgs

  6. － Z to bb Model Constraint for Z D. Atwood, G. Hiller, hep-ph/0307251 • One extra D quark scenario Z’bs N.G. Deshpande, D. K. Ghosh, hep-ph/0311332

  7. Model Electric dipole moment • Experimental constraint Hisano, Shimizu hep-ph/0406091 Z mediated flavor mixing no contribution

  8. Model Electric dipole moment • Neutral Higgs mediated flavor mixing Contribution to EDM constrains

  9. B → φKs s b － s s B → φKs • Standard model contribution explains B → φKs

  10. B → φKs s b s s s b s s B → φKs － • Z FCNC • For • One D model • scalar FCNC －

  11. B → φKs B → φKs • constraint • small contribution to • Z FCNC • multi D quark • 1 D quark • scalar FCNC • EDM • negative 20 % compared to SM contribtion

  12. B → φKs B → φKs • 2 or more D quark

  13. B → φKs B → φKs • 1 D quark scenario

  14. Conclusion • Vector-like down type quark + Higgs singlet • E6 GUT, baryogenesis • 1 D quark • 2 D quark • Higgs singlet → EDM

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