2008/02/27 by Belle Collaboration, I. Adachi, T. Lesiak +97 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2008.05.055
published as Phys.Lett.B665:9-15,2008 · 13 pages, 4 figures, submitted to Phys. Lett. B
arxiv created 2008/02/27 · openalex publication_date 2008/05/30 · arxiv updated 2009/12/01 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
We report a precise measurement of the masses of the Ξc(2645) and Ξc(2815) baryons using a data sample of 414 fb-1 collected by the Belle collaboration at the KEKB e+ e- collider. The states Ξc(2645)0,+ are observed in the Ξc+,0π-,+ decay modes, while the Ξc(2815)0,+ are reconstructed in the Ξc(2645)+,0π-,+ decay modes. The following mass splittings are determined: mΞc(2645)+ - mΞc(2645)0 = (-0.1 ± 0.3 (\rm stat) ± 0.6 (\rm syst)) \rm MeV/\rm c2 and mΞc(2815)+ - mΞc(2815)0 = (-3.4 ± 1.9 (\rm stat) ± 0.9 (\rm syst)) \rm MeV/\rm c2 with a much better precision than the current world averages. We also observe a new decay mode, Ξc(2980)0,+ → Ξc(2645)+,0π-,+.