2009/06/26 by Kai Yi, Yi, Kai
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.0906.4996
5 pages, 8 postscript figures, submitted to DIS 2009 proceeding, BF included
openalex publication_date 2009/06/26 · arxiv created 2009/06/30 · arxiv updated 2019/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the recent evidence for a new narrow structure, Y(4140), decaying to the J/ψϕ final state, in exclusive B+→ J/ψϕK+ decays in a data sample corresponding to an integrated luminosity of 2.7 \ifb collected at the CDF II detector. This narrow structure with its mass well above open charm pairs is unlikely to be a candidate for a conventional charmonium state. From a study of the X(3872) mass and width based on the world's largest sample of X(3872)→ J/ψπ+π- decays, we find that our X(3872) signal is consistent with a single state, and leads to the most precise measurement of the X(3872) mass.