Observation of the electromagnetic doubly OZI-suppressed decay J/psi -> phi pi(0)
2015 (English)In: Physical Review D, ISSN 1550-7998, Vol. 91, no 11, 112001Article in journal (Refereed) Published
Using a sample of 1.31 billion J/psi events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/psi -> phi pi(0), which is the first evidence for a doubly Okubo-Zweig-Iizuka suppressed electromagnetic J/psi decay. A clear structure is observed in the K+K- mass spectrum around 1.02 GeV/c(2), which can be attributed to interference between J/psi -> phi pi(0) and J/psi -> K+K- pi(0) decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of J/psi -> phi pi(0) are [2.94 +/- 0.16(stat) +/- 0.16(syst)] x 10(-6) and [1.24 +/- 0.33(stat) +/- 0.30(syst)] x 10(-7).
Place, publisher, year, edition, pages
2015. Vol. 91, no 11, 112001
IdentifiersURN: urn:nbn:se:uu:diva-257019DOI: 10.1103/PhysRevD.91.112001ISI: 000355412300001OAI: oai:DiVA.org:uu-257019DiVA: diva2:828254