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.
Measurement of the B -> J/psi K*(892) decay amplitudes RID C-2728-2008 RID A-2675-2009 RID C-5223-2009 RID C-5719-2008 RID A-8865-2012 RID D-1189-2011
LUSIANI, Alberto;
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.File in questo prodotto:
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