TL;DR
This paper reports recent findings from Belle, including a new resonance at 3.872 GeV, updates on \\DsJ resonances, and confirmation of large double charmonium production cross sections, leveraging the KEKB data sample.
Contribution
It presents new resonance discovery, updated resonance properties, and refined analysis of double charmonium production, advancing charm spectroscopy research.
Findings
Discovery of a new resonance at 3.872 GeV in B decays
Updated properties of \\DsJ resonances
Confirmed large cross section for double charmonium production
Abstract
The huge data sample accumulated at the KEKB storage ring allows for dedicated analyses in charm spectroscopy. A new, narrow resonance with a mass of 3.872\GeV was found in decays of mesons. Its properties remain unexplained. Results on various properties of the \DsJ resonances have been updated. Older results on the unexpectedly large cross section for double charmonium production in \epem annihilation have been confirmed and a refined analysis is presented.
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