Time-dependent CP violation in decays

Time-dependent CP violation in

decays

Kang Young Lee(KAIST, Daejeon)

@KIAS 2005. 10. 10.

Outline

Introduction Mixing-induced CP violation in

decay Anomalous right-handed couplings SUSY contributions Summary

Introduction CP violation in B decays

The SM source : CKM element

measurement in decay : agrees well with the SM prediction tree-level decay NP effect in decay is ignored mixing-induced CP violation

decays : penguin-mediated decays do not carry CP phase in the leading order sensitive to new physics effects discrepancy with the SM prediction?

2sin SKJB /

tdV

sssb

Nie

rste

LP

2005

Nierste LP 2005

decays : Cabibbo-suppressed decays involves and provides decay CP violation present experimental bound

Belle LP 2005 Inclusive decay is hardly discriminated from lar

ge background. Charged decay suffers from large long-distanc

e effect due to annihilation.

Time-dependent CP asymmetry in decay

tdV

Mixing-induced CP violation in decay

Effective Hamiltonian

where

Wilson coefficient at

with

Amplitudes w.r.t. the final state photon polarization

with

CP asymmetry

where

The parameter is defined by

In the SM,

,

bd mmCC // 7'7

We define

We rewrite the coefficient as

Anomalous right-handed couplingsK.Y. Lee, to appear in PLB

The effective lagrangian

where measures the NP effect. Effects of right-handed couplings

Numerical Analysis

Constraints

Results

is assumed

SUSY contributionsC.S.Kim, Y.G.Kim, K.Y.Lee, PRD 71, 054014 (2005)

The Wilson coefficients after RG running is given by

where the SUSY contribution is given by

Buras et al., NPB 566, 3 (2000), S. Baek et al., NPB 609, 442 (2001)

The mass insertion is defined by

Summary

decay is interesting for the study of CP violation because it involves the decay CP violation.

Time-dependent CP violation in decay is suppressed by due to the chiral operators.

Sizable CP violation requires the sizable chiral operator and .

Anomalous right-handed and couplings and SUSY can provide substantial CP violation.