Measurements of psi ' -> (p)over-barK(+)Sigma(0) and chi(cJ) -> (p)over-barK(+) Lambda

	Measurements of psi ' -> (p)over-barK(+)Sigma(0) and chi(cJ) -> (p)over-barK(+) Lambda
	BESIII Collaboration
刊名	PHYSICAL REVIEW D
	2013
卷号	87 期号:1 页码:12007
英文摘要	Using a sample of 1.06 x 10(8) psi' mesons collectedwith the BESIII detector at the BEPCII e(+)e(-) collider and chi(cJ) mesons produced via radiative transitions from the psi', we report the first observation for psi' -> (p) over barK(+)Sigma(0) + c.c. (charge conjugate), as well as improved measurements for the chi(cJ) hyperon decays chi(cJ) -> (p) over barK(+) Lambda + c.c. The branching fractions are measured to be B(psi' -> (p) over barK(+) Sigma(0) + c.c) = (1.67 +/- 0.13 +/- 0.12) x 10(-5), B(chi(c0) -> (p) over barK(+) Lambda + c.c) = (13.2 +/- 0.3 +/- 1.0) x 10(-4), B(chi(c1) -> (p) over barK(+) Lambda + c.c) = (4.5 +/- 0.2 +/- 0.4) x 10(-4), and B(chi(c2) -> (p) over barK(+) Lambda + c.c) = (8.4 +/- 0.3 +/- 0.6) x 10(-4), where the first error is statistical, and the second is systematic. In the decay of chi(c0) -> (p) over barK(+) Lambda + c.c:, an anomalous enhancement near threshold is observed in the invariant mass distribution of (p) over bar Lambda + c.c:, which cannot be explained by phase space. DOI: 10.1103/PhysRevD.87.012007
学科主题	Astronomy & Astrophysics; Physics
收录类别	SCI
WOS记录号	WOS:000313753200001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224475]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	BESIII Collaboration. Measurements of psi ' -> (p)over-barK(+)Sigma(0) and chi(cJ) -> (p)over-barK(+) Lambda[J]. PHYSICAL REVIEW D,2013,87(1):12007.
APA	BESIII Collaboration.(2013).Measurements of psi ' -> (p)over-barK(+)Sigma(0) and chi(cJ) -> (p)over-barK(+) Lambda.PHYSICAL REVIEW D,87(1),12007.
MLA	BESIII Collaboration."Measurements of psi ' -> (p)over-barK(+)Sigma(0) and chi(cJ) -> (p)over-barK(+) Lambda".PHYSICAL REVIEW D 87.1(2013):12007.