We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227 × 106 Y(4S) → BB̄ decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2β in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0 from its decay products. We measure sir2β = 0.722 ±0.040(stat) ±0.023(syst) in agreement with the standard model expectation.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Improved measurement of CP asymmetries in B0→(c̄c) K0(*) decays. PHYSICAL REVIEW LETTERS, 94(16) [10.1103/PhysRevLett.94.161803].

Improved measurement of CP asymmetries in B0→(c̄c) K0(*) decays

CARPINELLI, Massimo;
2005

Abstract

We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227 × 106 Y(4S) → BB̄ decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2β in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0 from its decay products. We measure sir2β = 0.722 ±0.040(stat) ±0.023(syst) in agreement with the standard model expectation.
Articolo in rivista - Articolo scientifico
Algorithms; Approximation theory; Astrophysics; Functions; Mathematical models; Probability distributions; Charge-parity (CP) violation; Decay-time distributions; Eigenstates; Meson decays; Standard model estimates; Eigenvalues and eigenfunctions;
English
2005
94
16
161803
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Improved measurement of CP asymmetries in B0→(c̄c) K0(*) decays. PHYSICAL REVIEW LETTERS, 94(16) [10.1103/PhysRevLett.94.161803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389874
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