We present a measurement of the decay amplitudes in B --> J/psiK*(892) channels using 20.7 fb(-1) of data collected at the Y(4S) resonance with the BABAR detector at PEP-H. We measure a P-wave fraction R-perpendicular to = (16.0 +/- 3.2 +/- 1.4)% and a longitudinal polarization fraction (59.7 +/- 2.8 +/- 2.4)%. The measurement of a relative phase that is neither 0 nor pi, phi (parallel to) = 2.50 +/- 0.20 +/- 0.08 radians, favors a departure from the factorization hypothesis. Although the decay B --> J/psiK pi proceeds mainly via K*(892), there is also evidence for K-2*(1430) and K pi S-wave contributions.

Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2001). Measurement of the B → J/ψK*(892) decay amplitudes. PHYSICAL REVIEW LETTERS, 87(24) [10.1103/PhysRevLett.87.241801].

Measurement of the B → J/ψK*(892) decay amplitudes

CARPINELLI, Massimo;
2001

Abstract

We present a measurement of the decay amplitudes in B --> J/psiK*(892) channels using 20.7 fb(-1) of data collected at the Y(4S) resonance with the BABAR detector at PEP-H. We measure a P-wave fraction R-perpendicular to = (16.0 +/- 3.2 +/- 1.4)% and a longitudinal polarization fraction (59.7 +/- 2.8 +/- 2.4)%. The measurement of a relative phase that is neither 0 nor pi, phi (parallel to) = 2.50 +/- 0.20 +/- 0.08 radians, favors a departure from the factorization hypothesis. Although the decay B --> J/psiK pi proceeds mainly via K*(892), there is also evidence for K-2*(1430) and K pi S-wave contributions.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2001
87
24
241801
none
Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2001). Measurement of the B → J/ψK*(892) decay amplitudes. PHYSICAL REVIEW LETTERS, 87(24) [10.1103/PhysRevLett.87.241801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390068
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