Observation of a near-threshold omega-J/psi mass enhancement in exclusive B-->K omega J/psi decays
S.-K. Choi, S.L. Olsen, et al. (for the Belle Collaboration)
TL;DR
This paper reports the observation of a significant near-threshold mass enhancement in the omega-J/psi system from exclusive B decays, indicating a potential new resonance or state.
Contribution
First observation of a near-threshold omega-J/psi mass enhancement in B decays with high statistical significance.
Findings
Mass enhancement observed near threshold
Statistical significance > 8 sigma
Data sample of 275 million BB-bar pairs
Abstract
We report the observation of a near-threshold enhancement in the omega-J/psi invariant mass distribution for exclusive B-->K omega J/psi decays. The results are obtained from a 253 fb-1 data sample that contains 275 million BB-bar meson pairs that were collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. The statistical significance of the omega-J/psi mass enhancement is estimated to be greater than 8 sigma.
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