We present measurements of the branching fraction B and longitudinal polarization fraction fL for B0→a1(1260)+a1(1260)- decays, with a1(1260)±→π-π+π±. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465×106 produced BB̄ pairs. We measure B(B0→a1(1260)+a1(1260)-) ×[B(a1(1260)+→π-π+π+)]2=(11.8±2.6±1.6) ×10-6 and fL=0.31±0.22±0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties. © 2009 The American Physical Society.

Aubert, B., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., Prudent, X., et al. (2009). Observation and polarization measurement of B0→a1(1260)+a1(1260)- decay. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80(9), 1-8 [10.1103/PhysRevD.80.092007].

Observation and polarization measurement of B0→a1(1260)+a1(1260)- decay

PATRIGNANI, CLAUDIA;
2009

Abstract

We present measurements of the branching fraction B and longitudinal polarization fraction fL for B0→a1(1260)+a1(1260)- decays, with a1(1260)±→π-π+π±. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465×106 produced BB̄ pairs. We measure B(B0→a1(1260)+a1(1260)-) ×[B(a1(1260)+→π-π+π+)]2=(11.8±2.6±1.6) ×10-6 and fL=0.31±0.22±0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties. © 2009 The American Physical Society.
2009
Aubert, B., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., Prudent, X., et al. (2009). Observation and polarization measurement of B0→a1(1260)+a1(1260)- decay. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80(9), 1-8 [10.1103/PhysRevD.80.092007].
Aubert, B; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/548071
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