Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-28
Phys.Rev.D76:016004,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures added (to total of 11 figures), revision to clarify b -> s photon contrast with Bs and D mixing
Scientific paper
10.1103/PhysRevD.76.016004
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 2\Phi_{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 2\Phi_D \sim -0.2.
Hou Wei-Shu
Nagashima Makiko
Soddu Andrea
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