We present measurements of the branching fraction and time-dependent CP asymmetries in B0→J/ψπ0 decays based on 466×106 Υ(4S)→BB̄ events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S=-1.23±0.21(stat)±0.04(syst) and C=-0.20±0.19(stat) ±0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B0→J/ψπ0)=[1.69±0.14(stat) ±0.07(syst)]×10-5.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Evidence for CP violation in B0→J/ψπ0 decays. PHYSICAL REVIEW LETTERS, 101(2) [10.1103/PhysRevLett.101.021801].

Evidence for CP violation in B0→J/ψπ0 decays

CARPINELLI, Massimo;
2008

Abstract

We present measurements of the branching fraction and time-dependent CP asymmetries in B0→J/ψπ0 decays based on 466×106 Υ(4S)→BB̄ events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S=-1.23±0.21(stat)±0.04(syst) and C=-0.20±0.19(stat) ±0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B0→J/ψπ0)=[1.69±0.14(stat) ±0.07(syst)]×10-5.
Articolo in rivista - Articolo scientifico
Standards; American Physical Society (APS); Asymmetric energy; B factories; BaBar detectors; Branching fractions; Charge parity (CP) violation; CP asymmetries; Standard deviation (STD); Systematic uncertainties; Time-dependent; High energy physics;
English
2008
101
2
021801
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Evidence for CP violation in B0→J/ψπ0 decays. PHYSICAL REVIEW LETTERS, 101(2) [10.1103/PhysRevLett.101.021801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389567
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