With the full BABAR data sample of 465×106 BB̄ pairs, we observe the decays B±→φK1(1270)± and B±→φK2 *(1430)±. We measure the branching fractions (6.1±1.6±1. 1)×10-6 and (8.4±1.8±1.0)×10-6 and the fractions of longitudinal polarization 0.46-0.13-0.07+0.12+0.06 and 0.80-0.10+0.09±0. 03, respectively. We also report on the B±→φK0*(1430) ± decay branching fraction of (7.0±1.3±0.9)×10-6 and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B± decay rates to final states with φ and K1(1400)±, K*(1410)±, K2(1770)±, or K2(1820)±. Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Observation and polarization measurements of B±→φK1± and B±→φK2*±. PHYSICAL REVIEW LETTERS, 101(16) [10.1103/PhysRevLett.101.161801].

Observation and polarization measurements of B±→φK1± and B±→φK2*±

CARPINELLI, Massimo;
2008

Abstract

With the full BABAR data sample of 465×106 BB̄ pairs, we observe the decays B±→φK1(1270)± and B±→φK2 *(1430)±. We measure the branching fractions (6.1±1.6±1. 1)×10-6 and (8.4±1.8±1.0)×10-6 and the fractions of longitudinal polarization 0.46-0.13-0.07+0.12+0.06 and 0.80-0.10+0.09±0. 03, respectively. We also report on the B±→φK0*(1430) ± decay branching fraction of (7.0±1.3±0.9)×10-6 and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B± decay rates to final states with φ and K1(1400)±, K*(1410)±, K2(1770)±, or K2(1820)±. Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.
Articolo in rivista - Articolo scientifico
Decay (organic); Branching fractions; Cp violations; Data samples; Decay rates; Final states; Longitudinal polarizations; Polarization measurements; Polarization patterns; Uncertain sources; Upper limits; Polarization;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Observation and polarization measurements of B±→φK1± and B±→φK2*±. PHYSICAL REVIEW LETTERS, 101(16) [10.1103/PhysRevLett.101.161801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389618
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