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

(The BABAR Collaboration)

Research output: Contribution to journalArticlepeer-review


We present a measurement of the decay amplitudes in B → J/ΨK* channels using 20.7 fb−1 of data collected at the ϒ(4S) resonance with the BABAR detector at PEP-II. We measure a P-wave fraction R=(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 π, ψ = 2.50°0.20°0.08 radians, favors a departure from the factorization hypothesis. Although the decay B → J/ΨKπ proceeds mainly via K*(892), there is also evidence for K*2(1430) and KπS-wave contributions.

Original languageEnglish (US)
Pages (from-to)241801-1-241801-7
JournalPhysical Review Letters
Issue number24
StatePublished - Dec 10 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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