1997/03/31 by Xing, Zhi-zhong
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.hep-ph/9703458
Determination of the characteristic CP-violating quantity sin (2β) should be the central goal of a B-meson factory in its first-round experiments. Except the gold-plated channels Bd→ ψKS and ψKL, three other types of Bd decays to CP eigenstates can also serve for the extraction of sin (2β) in the standard model: (a) the CP-forbidden transitions (BdBd)Υ(4S) → (Xc KS) (Xc KS) and (Xc KL) (Xc KL), where Xc = ψ, ψ', ηc, etc; (b) the decay modes Bd→ D(*)+D(*)- and D(*)0D(*)0, whose amplitudes have simple isospin relations; and (c) the decay modes Bd→ (fCP)D + (π0, ρ0, a01, etc), in which fCP is a CP eigenstate (such as π+π-, K+K- or KS π0) arising from either D0 or D0 in the neglect of D0-D0 mixing. We carry out an analysis of the CP-violating signals existing in these typical processes, without loss of the possibility that new physics might significantly affect B0d-B0d or K0-K0 mixing. We also show that the magnitude of sin (2β) can be well determined, in terms of only |Vus|, md/ms and mu/mc, from a variety of quark mass ansatze.