EPJ

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EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 4, 283-287
DOI 10.1007/s100529800757

Towards isolation of new physics in B0s-${\bar{B}^0_s}$ mixing

Zhi-zhong Xing

Department of Physics, Nagoya University, Chikusa-ku, Nagoya 464-01, Japan (e-mail: xing@eken.phys.nagoya-u.ac.jp)

Received: 24 July 1997 / Published online: 20 February 1998

Abstract
In many extensions of the standard model, new physics is possible to contribute significantly to B0s-${\bar{B}^0_s}$ mixing. We show that the effect of new physics, both its phase information and its magnitude, can be isolated from measurements of CP asymmetries in the semileptonic Bs transitions and in some nonleptonic Bs decays into hadronic CP eigenstates. We also find that the rates of CP-forbidden decays at the $\Upsilon (5S)$ resonance are not suppressed by the large Bs mass difference, thus they can be used to extract the CP-violating phase of new physics in either B0s-${\bar{B}^0_s}$ or K0-$\bar{K}^0$ mixing.

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