标题:Measurements of ψ′→p̄K+Σ0 and χcJ→p̄K+Λ
作者:Ablikim M.; Achasov M.N.; Albayrak O.; Ambrose D.J.; An F.F.; An Q.; Bai J.Z.; Ban Y.;等 更多
作者机构:[Ablikim, M] Institute of High Energy Physics, Beijing 100049, China;[ Achasov, M.N] G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibir 更多
通讯作者地址:[Ablikim, M] Institute of High Energy PhysicsChina
来源:Physical Review D - Particles, Fields, Gravitation and Cosmology
出版年:2013
卷:87
期:1
DOI:10.1103/PhysRevD.87.012007
摘要:Using a sample of 1.06×108 ψ′ mesons collected with the BESIII detector at the BEPCII e+e- collider and χcJ mesons produced via radiative transitions from the ψ′, we report the first observation for ψ′→p̄K+Σ0+c.c. (charge conjugate), as well as improved measurements for the χcJ hyperon decays χcJ→p̄K+Λ+c.c. The branching fractions are measured to be B(ψ′→p̄K +Σ0+c.c.)=(1.67±0.13±0.12)×10-5, B(χc0→p̄K+Λ+c.c.)=(13.2±0. 3±1.0)×10-4, B(χc1→p̄K +Λ+c.c.)=(4.5±0.2±0.4)×10-4, and B(χc2→p̄K+Λ+c.c.)=(8.4±0. 3±0.6)×10-4, where the first error is statistical, and the second is systematic. In the decay of χc0→p̄K +Λ+c.c., an anomalous enhancement near threshold is observed in the invariant mass distribution of p̄Λ+c.c., which cannot be explained by phase space. © 2013 American Physical Society.
收录类别:SCOPUS
Scopus被引频次:4
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872979941&doi=10.1103%2fPhysRevD.87.012007&partnerID=40&md5=bc5f089367e039eabc280a63d62eb2f3
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