We present measurements of branching fractions and CP-violating asymmetries for two-body neutral (B) over bar meson decays to charged pions and kaons based on a sample of about 88x10(6) Y(4S)-->B (B) over bar decays. From a time-independent fit we measure the charge-averaged branching fractions B(B-0-->pi(+)pi(-))=(4.7+/-0.6+/-0.2)x10(-6), B(B-0-->K(+)pi(-))=(17.9+/-0.9+/-0.7)x10(-6), and the direct CP-violating charge asymmetry A(Kpi)=-0.102+/-0.050+/-0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B-0-->pi(+)pi(-) CP-violating parameters S-pipi=0.02+/-0.34+/-0.05 [-0.54,+0.58] and C-pipi=-0.30+/-0.25+/-0.04 [-0.72,+0.12].

Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurements of branching fractions and CP-violating asymmetries in B0 → π+π-, K+π-, K+K- decays. PHYSICAL REVIEW LETTERS, 89(28), 1-7 [10.1103/PhysRevLett.89.281802].

Measurements of branching fractions and CP-violating asymmetries in B0 → π+π-, K+π-, K+K- decays

CARPINELLI, Massimo;
2002

Abstract

We present measurements of branching fractions and CP-violating asymmetries for two-body neutral (B) over bar meson decays to charged pions and kaons based on a sample of about 88x10(6) Y(4S)-->B (B) over bar decays. From a time-independent fit we measure the charge-averaged branching fractions B(B-0-->pi(+)pi(-))=(4.7+/-0.6+/-0.2)x10(-6), B(B-0-->K(+)pi(-))=(17.9+/-0.9+/-0.7)x10(-6), and the direct CP-violating charge asymmetry A(Kpi)=-0.102+/-0.050+/-0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B-0-->pi(+)pi(-) CP-violating parameters S-pipi=0.02+/-0.34+/-0.05 [-0.54,+0.58] and C-pipi=-0.30+/-0.25+/-0.04 [-0.72,+0.12].
Articolo in rivista - Articolo scientifico
Computer simulation; Kinematics; Mathematical models; Matrix algebra; Monte Carlo methods; Probability density function; Branching fractions; Cherenkov angles; Mesons; Standard model; Electron energy levels;
English
2002
89
28
1
7
281802
none
Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurements of branching fractions and CP-violating asymmetries in B0 → π+π-, K+π-, K+K- decays. PHYSICAL REVIEW LETTERS, 89(28), 1-7 [10.1103/PhysRevLett.89.281802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390053
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