Measurement of the CP-violation parameter sin(2beta) in B0 to J/psi-Kshort decays

Details Measurement of the CP-violation parameter sin(2beta) in B0 to J/psi-Kshort decays Measurement of the CP-violation parameter sin(2beta) in B0 to J/psi-Kshort decays

1999-08-19

arxiv.org/abs/hep-ex/9908055v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 Pages; Contribution to The International Europhysics Conference on High-Energy Physics (EPS-HEP 99), Tampere, Finland, July

Scientific paper

A sample of 400 $B^0_d/\bar{B}{^0_d} \to J/\psi K^0_s$ decays collected in
$\bar{p}p$ collisions by the CDF detector is used to directly measure the
CP-violation parameter $\sin(2\beta)$. We find $\sin(2\beta) = 0.79
^{+0.41}_{-0.44}$,favoring the standard model expectation of a large $CP$
violation in this $B^0$ decay mode.

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