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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

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Time-dependent CP violation in decays

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  1. Time-dependent CP violation in decays Kang Young Lee (KAIST, Daejeon) @KIAS 2005. 10. 10.

  2. Outline • Introduction • Mixing-induced CP violation in decay • Anomalous right-handed couplings • SUSY contributions • Summary

  3. 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?

  4. Nierste LP 2005

  5. Nierste LP 2005

  6. decays : Cabibbo-suppressed decays involves and provides decay CP violation present experimental bound Belle LP 2005 • Inclusive decay is hardly discriminated from large background. • Charged decay suffers from large long-distance effect due to annihilation. Time-dependent CP asymmetry in decay

  7. Mixing-induced CP violation in decay • Effective Hamiltonian where • Wilson coefficient at with

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

  9. CP asymmetry where • The parameter l is defined by • In the SM, • ,

  10. We define • We rewrite the coefficient as

  11. Anomalous right-handed couplingsK.Y. Lee, to appear in PLB • The effective lagrangian where measures the NP effect. • Effects of right-handed couplings

  12. Numerical Analysis • Constraints • Results

  13. is assumed

  14. 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

  15. 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.

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