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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