BB→φ→φKKss in vector-like quark model in vector-like quark model

Masato SenamiMasato Senami(ICRR, the University of Tokyo)(ICRR, the University of Tokyo)

K. Higuchi, MS and K. Yamamotoin preparation

ContentsContents

1. Introduction

2. Modelelectric dipole moment

3. B →φKs

4. Summary

ContentsContents

Motivation

CP violation in

Standard Model

New physics beyond the Standard model?

IntroductionIntroduction

vector-like down type quark

Vector-like down type quark model

Vector-like down type quark

+ Higgs singlet S

ModelModel

d-D quark mixing

SU(2) singlet, U(1) → ±1/3

mass term for vector-like quark

E6 GUT

Flavor mixing

Flavor mixing

ModelModel

ξ: neutral Higgs

Z:

Higgs:

no mixing

weak basis → mass basis

Constraint for Z

One extra D quark scenario

ModelModel

Z’bs

Z to bb－

D. Atwood, G. Hiller, hep-ph/0307251

N.G. Deshpande, D. K. Ghosh, hep-ph/0311332

Electric dipole moment

Experimental constraint

Hisano, Shimizu hep-ph/0406091

Z mediated flavor mixing

no contribution

ModelModel

Electric dipole moment

Neutral Higgs mediated flavor mixing

ModelModel

constrains

Contribution to EDM

B → φKs

Standard model contribution

B → φKsB → φKs 　　

b

s

s

s

－

explains B → φKs

B → φKs

Z FCNC

For One D model

scalar FCNC

B → φKsB → φKs 　　

b

s

s

s

b

s

s

s

－

－

B → φKs

constraint small contribution to

Z FCNC multi D quark 1 D quark

scalar FCNC EDM

negative

B → φKsB → φKs 　　

20 % compared to SM contribtion

B → φKs

2 or more D quark

B → φKsB → φKs 　　

-28 -27 -26 -25 -24 -23-1

-0.5

0

0.5

1

B → φKs

1 D quark scenario

B → φKsB → φKs 　　

Conclusion

Vector-like down type quark + Higgs singletE6 GUT, baryogenesis1 D quark2 D quarkHiggs singlet → EDM