Using Bs(t) -> phi K_s to measure Sin 2 beta

Details Using Bs(t) -> phi K_s to measure Sin 2 beta Using Bs(t) -> phi K_s to measure Sin 2 beta

2001-11-21

arxiv.org/abs/hep-ph/0111266v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Latex, Talk presented at MRST 2001

Scientific paper

In this talk we show that, unlike other pure $b\to d$ penguin processes, the decay $\bs(t)\to\phi\ks$ is dominated by a single amplitude, that of the internal $t$-quark. Thus, the indirect CP asymmetry in this decay probes $\sin 2\beta$. This cancellation holds for most part of the parameter space and error on $\sin 2\beta$ is less than 10%. By measuring the direct CP asymmetry, one can get a better idea of the probable error on $\sin 2\beta$.

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