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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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masato senami icrr the university of tokyo
Masato Senami

(ICRR, the University of Tokyo)

B→φKs in vector-like quark model

K. Higuchi, MS and K. Yamamoto

in preparation

contents

Contents

Contents

1. Introduction

2. Model

electric dipole moment

3. B →φKs

4. Summary

motivation

Introduction

Motivation
  • CP violation in
    • Standard Model
  • New physics beyond the Standard model?

vector-like down type quark

vector like down type quark model

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

flavor mixing

Model

Flavor mixing

no mixing

  • Flavor mixing

Z:

weak basis → mass basis

Higgs:

ξ: neutral Higgs

constraint for z

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

electric dipole moment

Model

Electric dipole moment
  • Experimental constraint

Hisano, Shimizu hep-ph/0406091

Z mediated flavor mixing

no contribution

electric dipole moment1

Model

Electric dipole moment
  • Neutral Higgs mediated flavor mixing

Contribution to EDM

constrains

b k s

B → φKs

s

b

s

s

B → φKs
  • Standard model contribution

explains B → φKs

b k s1

B → φKs

s

b

s

s

s

b

s

s

B → φKs

  • Z FCNC
    • For
    • One D model
  • scalar FCNC

b k s2

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

b k s3

B → φKs

B → φKs
  • 2 or more D quark
b k s4

B → φKs

B → φKs
  • 1 D quark scenario
conclusion
Conclusion
  • Vector-like down type quark + Higgs singlet
    • E6 GUT, baryogenesis
    • 1 D quark
    • 2 D quark
    • Higgs singlet → EDM
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