Observation of a new DsJ meson in B+ -> D0-bar D0 K+ decays
The Belle Collaboration: K. Abe, et al
TL;DR
This paper reports the discovery of a new DsJ meson in B+ decays, providing precise measurements of its mass, width, and spin-parity, based on a large dataset from the Belle detector at KEKB.
Contribution
The first observation of a new DsJ meson in B+ decays with detailed measurements of its properties, expanding understanding of charm-strange meson spectroscopy.
Findings
New DsJ meson observed at 2715 MeV/c^2
Measured width of 115 MeV/c^2
Determined spin-parity as 1-
Abstract
We report the observation of a new DsJ meson produced in B+ -> D0-bar DsJ -> D0-bar D0 K+. This state has a mass of M = 2715 +-11(stat) +11-14(syst) MeV/c^2, a width Gamma = 115 +-20(stat) +36-32(syst) MeV/c^2 and a spin-parity 1-. The results are based on an analysis of 449 million BB-bar events collected at the Upsilon(4S) resonance in the Belle detector at the KEKB asymmetric energy e+e- collider.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Superconducting Materials and Applications