2016/05/30 by Y. Kato, Yuji Katō, T. Iijima +187 · 45 citations
Chemistry · Physics and Astronomy · #Baryon #Branching (polymer chemistry) #Branching fraction #Chemistry #Collider #Computer science #Data mining #Electron–positron annihilation #Hadron #High-Energy Particle Collisions Research #KEKB #Measure (data warehouse) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.94.032002
published in Physical review. D/Physical review. D. 94(3) (American Physical Society) · Submitted to PRD
arxiv created 2016/05/30 · openalex created_date 2016/06/24 · openalex publication_date 2016/08/08 · arxiv updated 2016/08/24 · openalex updated_date 2026/08/06
We report the discovery of \mathrm\ensuremathΞc(3055)0, observed by its decay into the final-state \mathrm\ensuremathΛD0, and present the first observation and evidence of the decays of \mathrm\ensuremathΞc(3055)+ and \mathrm\ensuremathΞc(3080)+ into \mathrm\ensuremathΛD+. We also perform a combined analysis of the \mathrm\ensuremathΛD+ with the \mathrm\ensuremathΣc++K^\ensuremath- and \mathrm\ensuremathΣc*++K^\ensuremath- decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(\mathrm\ensuremathΞc(3055)+\ensuremath→\phantom\rule0ex0ex\mathrm\ensuremathΛD+)/B(\mathrm\ensuremathΞc(3055)+\ensuremath→\mathrm\ensuremathΣc++K^\ensuremath-)=5.09\ifmmode±\else\textpm\fi1.01\ifmmode±\else\textpm\fi0.76, B(\mathrm\ensuremathΞc(3080)+\ensuremath→\mathrm\ensuremathΛD+)/B(\mathrm\ensuremathΞc(3080)+\ensuremath→\mathrm\ensuremathΣc++K^\ensuremath-)=\phantom\rule0ex0ex1.29\ifmmode±\else\textpm\fi0.30\ifmmode±\else\textpm\fi0.15, and B(\mathrm\ensuremathΞc(3080)+\ensuremath→\mathrm\ensuremathΣc*++K^\ensuremath-)/B(\mathrm\ensuremathΞc(3080)+\ensuremath→\mathrm\ensuremathΣc++K^\ensuremath-)=1.07\ifmmode±\else\textpm\fi0.27\ifmmode±\else\textpm\fi0.04, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb^\ensuremath-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e^\ensuremath- collider.