Measurement of CP Asymmetries at BELLE

Details Measurement of CP Asymmetries at BELLE Measurement of CP Asymmetries at BELLE

2002-12-23

arxiv.org/abs/hep-ex/0212059v1

ECONF C020805:TW02,2002

Physics

High Energy Physics

High Energy Physics - Experiment

Invited talk at the SLAC Summer Institute Topical Conference, August 2002, (SSI02-TW02), 26 pages, LaTex, 24 EPS figures

Scientific paper

The Belle experiment at the KEK $B$ factory has collected 93 fb$^{-1}$ of electron positron collisions at $\sqrt s = 10.6$ GeV. This has produced a sample of 85 million $B {\bar B}$ meson pairs that can be used to study $CP$ violation in rare (and not so rare) B decay modes. Here I report on a measurement of indirect CP violation in the decay $B^0 \to J/\psi K^0_S$, as well as time dependent CP asymmetries in rarer modes such as $B^0 \to \pi^+ \pi^-, \eta' K_S^0$ and $\phi K^0_S$. I summarise the prospects for improving the precision on these and related measurements.

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