time-dependent cp violation in decays
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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.