2011/03/28 by D.V. Bugg, D V Bugg, Bugg, D V
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1103.5363
5 pages, 5 figures. Major revision, including new experimental information and further insight into the reaction mechanism. Withdrawn: programming error. After correction, the predicted width of Y(4140) is much larger than experiment
openalex publication_date 2011/03/28 · arxiv created 2011/12/05 · arxiv updated 2011/12/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Y(4140) observed by CDF appears to have a novel explanation. Its mass and width coincide within experimental error with a two-step process. In the first step, Y(4140) -> Dsbar + pi + Ds where the pion is virtual. A loop diagram involving this virtual pion allows Y(4140) de-excitation to J/psi + phi. Its predicted spin-parity is JPC = 1++. The same mechanism for Dbar-D^* configurations predicts a similar structure at 3911-3918 MeV, consistent with the peak at 3915 +- 3 MeV observed in omega J/psi by Babar and Belle. Relative branching ratios observed for B+ -> phi J/psi K+ and B+ -> omega J/psi K+ require that this mechanism accelerates decays of Y(4140) by a factor ~ 104 compared with isospin-violating decays via Y(4140) -> Dsbar + D^*s. Similar processes are well known in molecular chemistry.