Measurement of the $B \to J / ψ K^{*}$ (892) Decay Amplitudes

Authors:

DBD. Boutigny
D. Boutigny
JGJ.-M. Gaillard
J.-M. Gaillard
AHA. Hicheur
A. Hicheur
YKY. Karyotakis
Y. Karyotakis
JLJ. P. Lees
J. P. Lees
PRP. Robbe
P. Robbe
VTV. Tisserand
V. Tisserand
APA. Palano
A. Palano
GCG. P. Chen
G. P. Chen
JCJ. C. Chen
J. C. Chen
NQN. D. Qi
N. D. Qi

Publisher website

20 November 2001

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 87 (24) , 241801
DOI:10.1103/physrevlett.87.241801
PMID:11736492

Abstract

We present a measurement of the decay amplitudes in

B \to J / ψ K^{*} (892)

channels using

20.7 fb^{- 1}

of data collected at the

ϒ (4 S)

resonance with the BABAR detector at PEP-II. We measure a

P

-wave fraction

R_{⊥} = (16.0 \pm 3.2 \pm 1.4) %

and a longitudinal polarization fraction

(59.7 \pm 2.8 \pm 2.4) %

. The measurement of a relative phase that is neither 0 nor

π

,

φ_{∥} = 2.50 \pm 0.20 \pm 0.08

radians, favors a departure from the factorization hypothesis. Although the decay

B \to J / ψ K π

proceeds mainly via

K^{*} (892)

, there is also evidence for

K_{2}^{*} (1430)

and

K π

S

-wave contributions.

Keywords

All Related Versions

Version 1, 2001-07-20, ArXiv

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