Measurement of the B-->J/psi K^*(892) decay amplitudes

Preprint

20 July 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0107049

Abstract

We present a measurement of the decay amplitudes in B-->J/psi K^*(892) channels using 20.7 fb-1 of data collected at the Upsilon(4S) resonance with the BABAR detector at PEP-II. We measure a P-wave fraction R_perp = (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_ll = 2.50+/-0.20+/-0.08 radians, favors a departure from the factorization hypothesis. Although the decay B-->J/psi Kpi proceeds mainly via K^*(892), there is also evidence for K^*_2(1430) and Kpi S-wave contributions.

Keywords

DECAY AMPLITUDES
LONGITUDINAL
POLARIZATION
J/PSI K
WAVE
KPI

All Related Versions

Version 1, 2001-07-20, ArXiv
Published version: Physical Review Letters, 87 (24), 241801.

This publication has 0 references indexed in Scilit: