We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23 X 10(6) Y (4S) --> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAG. Zn this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2 beta, is derived from the decay time distributions in such events. The result is sin2 beta = 0.34 +/- 0.20 (stat) +/- 0.05 (syst).

Measurement of CP-violating asymmetries in B-0 decays to CP eigenstates / Aubert, B., Boutigny, D., DE BONIS, I., Gaillard, J.m., Jeremie, K., Karyotakis, Y., Lees, J.p., Robbe, P., Tisserand, V., Palano, A., Chen, G.p., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Reinertsen, P.l., Stugu, B., Abbott, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 86:(2001), pp. 2515-2522. [10.1103/PhysRevLett.86.2515]

Measurement of CP-violating asymmetries in B-0 decays to CP eigenstates

RAHATLOU, SHAHRAM;CAVOTO, Gianluca;DEL RE, Daniele;FACCINI, Riccardo;FERRONI, Fernando;VOENA C;
2001

Abstract

We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23 X 10(6) Y (4S) --> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAG. Zn this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2 beta, is derived from the decay time distributions in such events. The result is sin2 beta = 0.34 +/- 0.20 (stat) +/- 0.05 (syst).
2001
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of CP-violating asymmetries in B-0 decays to CP eigenstates / Aubert, B., Boutigny, D., DE BONIS, I., Gaillard, J.m., Jeremie, K., Karyotakis, Y., Lees, J.p., Robbe, P., Tisserand, V., Palano, A., Chen, G.p., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Reinertsen, P.l., Stugu, B., Abbott, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 86:(2001), pp. 2515-2522. [10.1103/PhysRevLett.86.2515]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/95845
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