Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode

Abstract

Combining the measured B_s mixing with b \to s\ell^+\ell^- rate data, we find a sizable 4 generation t' quark effect is allowed, for example with m_{t'} \sim 300 GeV and V_{t's}^*V_{t'b} \sim 0.025 e^{\pm i 70^\circ}, which could underly the new physics indications in CP violation studies of b \to s qbar q transitions. With positive phase, large and negative mixing-dependent CP violation in B_s system is predicted, \sin 2Φ_{B_s} \sim -0.5 to -0.7. This can also be probed via width difference methods. As a corollary, the short distance generated D^0-D^0bar mass difference is found to be consistent with, if not slightly higher than, recent B factory measurements, while CP violation is subdued with \sin 2Φ_D \sim -0.2.

5 pages, 3 figures added (to total of 11 figures), revision to clarify b -> s photon contrast with Bs and D mixing

References in corpus (6)

• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• New Physics contributions to the lifetime difference in D0-anti-D0 mixing
• Fourth Generation CP Violation Effect on B -> K pi, phi K and rho K in NLO PQCD
• Charm quark mass dependence of the electromagnetic dipole operator contribution to anti-B -> X(s) gamma at O(alpha**2(s))
• Four Generation CP Violation in B -> phi K^0, pi^0 K^0, eta' K^0 and Hadronic Uncertainties

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