First observation of gamma gamma -> p(p)over-barK(+)K(-) and search for exotic baryons in pK systems

doi:10.1103/PhysRevD.93.112017

IHEP OpenIR > 实验物理中心

	First observation of gamma gamma -> p(p)over-barK(+)K(-) and search for exotic baryons in pK systems
	Belle Collaboration
	2016
发表期刊	PHYSICAL REVIEW D
卷号	93 期号:11
文章类型	Article
摘要	The process gamma gamma -> p (p) over barK(+)K(-) and its intermediate processes are measured for the first time using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The production of p (p) over barK(+)K(-) and a Lambda(1520)(0) ((Lambda) over bar (1520)(0)) signal in the pK(-) ((p) over barK(+)) invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near 1540 MeV/c(2), denoted as Theta(1540)(0) ((Theta) over bar (1540)(0)) or Theta(1540)(++) (Theta(1540)(--)), is seen in the pK(-) ((p) over barK(+)) or pK(+) ((p) over barK(-)) invariant mass spectra. Cross sections for gamma gamma -> p (p) over barK(+)K(-), Lambda(1520)(0)(p) over barK(+) + c.c. and the products sigma(gamma gamma -> Theta(1540)(0)(p) over barK(+) + c.c.)B(Theta(1540)(0) -> pK(-)) and sigma(gamma gamma -> Theta(1540)(++)(p) over barK(-) + c.c.)B(Theta(1540)(++) -> pK(+)) are measured. We also determine upper limits on the products of the chi(c0) and chi(c2) two-photon decay widths and their branching fractions to p (p) over barK(+)K(-) at the 90% credibility level.
DOI	10.1103/PhysRevD.93.112017
关键词[WOS]	BELLE ; PENTAQUARKS ; COLLISIONS ; MODEL
语种	英语
WOS记录号	WOS:000378820600002
引用统计
文献类型	期刊论文
条目标识符	http://ir.ihep.ac.cn/handle/311005/260957
专题	实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Belle Collaboration. First observation of gamma gamma -> p(p)over-barK(+)K(-) and search for exotic baryons in pK systems[J]. PHYSICAL REVIEW D,2016,93(11).
APA	Belle Collaboration.(2016).First observation of gamma gamma -> p(p)over-barK(+)K(-) and search for exotic baryons in pK systems.PHYSICAL REVIEW D,93(11).
MLA	Belle Collaboration."First observation of gamma gamma -> p(p)over-barK(+)K(-) and search for exotic baryons in pK systems".PHYSICAL REVIEW D 93.11(2016).

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20160475.pdf（849KB）	期刊论文	作者接受稿	限制开放	CC BY-NC-SA	请求全文