Measurement of the CP-violation parameter $\sin(2\beta)$ in $B_d^0 / \overline{B}_d^0 \to J/\psi K^0_S$ decays

Collaboration

Jun, 1998

11 pages

Published in:

e-Print:

DOI:

PDG: sin

(2\beta )

Report number:

Experiments:

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Abstract:

We present a measurement of the time-dependent asymmetry in the rate for

\bar{B}{^0_d}

versus

B^0_d

decays to

J/\psi K^0_S

. In the context of the Standard Model this is interpreted as a measurement of the CP-violation parameter

\sin(2\beta)

. A total of

198\pm 17

B^0_d/\bar{B}{^0_d}

decays were observed in

p\bar{p}

collisions at

\sqrt{s} = 1.8

TeV by the CDF detector at the Fermilab Tevatron. The initial

b

-flavor is determined by a same side flavor tagging technique. Our analysis results in

\sin(2\beta) = 1.8\pm 1.1(stat)\pm 0.3(syst)

.

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Measurement of the CP-violation parameter sin⁡(2β)\sin(2\beta)sin(2β) in Bd0/B‾d0→J/ψKS0B_d^0 / \overline{B}_d^0 \to J/\psi K^0_SBd0​/Bd0​→J/ψKS0​ decays