Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0c+consistent with a charged $$\Xi _c(2930)^{+}$$c(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0K¯0c+¯c-at Belle

doi:10.1140/epjc/s10052-018-6425-5

	Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0c+consistent with a charged $$\Xi _c(2930)^{+}$$c(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0K¯0c+¯c-at Belle
	Belle Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2018
卷号	78 期号:11 页码:928
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-018-6425-5
文献子类	Article
英文摘要	We report evidence for the charged charmed-strange baryon Xi(c)(2930)(+) with a signal significance of 3.9 sigma with systematic errors included. The charged Xi(c)(2930)(+) is found in its decay to K-S(0)Lambda(+)(c) in the substructure of (B) over bar (0) -> K-S(0)Lambda(+)(c)(Lambda) over bar (-)(c) decays. The measured mass and width are [2942.3 +/- 4.4(stat.) +/- 1.5(syst.)] MeV/c(2) and [14.8 +/- 8.8(stat.) +/- 2.5(syst.)] MeV, respectively, and the product branching fraction is B((B) over bar (0) -> Xi(c)(2930)(+)(Lambda) over bar (-)(c)) B(Xi(c)(2930)(+) -> (K) over bar (0)(S)Lambda(+)(c)) = [2.37 +/- 0.51(stat.) +/- 0.31 (syst.)] x 10(-4). We also measure B((B) over bar (0) -> (K) over bar (0)(S)Lambda(+)(c)(Lambda) over bar (-)(c)) = [3.99 +/- 0.76(stat.) +/- 0.51(syst.)] x 10(-4) with greater precision than previous experiments, and present the results of a search for the charmonium-like state Y (4660) and its spin partner, Y-eta, in the Lambda(+)(c)(Lambda) over bar (-)(c) invariant mass spectrum. No clear signals of the Y (4660) or Y-eta are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. Thesemeasurements are obtained from a sample of (772 +/- 11) x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.
电子版国际标准刊号	1434-6052
WOS关键词	DIQUARK PICTURE ; BARYONS ; PACKAGE
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000450160900007
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286965]
专题	高能物理研究所_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. Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0c+consistent with a charged $$\Xi _c(2930)^{+}$$c(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0K¯0c+¯c-at Belle[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(11):928.
APA	Belle Collaboration.(2018).Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0c+consistent with a charged $$\Xi _c(2930)^{+}$$c(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0K¯0c+¯c-at Belle.EUROPEAN PHYSICAL JOURNAL C,78(11),928.
MLA	Belle Collaboration."Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0c+consistent with a charged $$\Xi _c(2930)^{+}$$c(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0K¯0c+¯c-at Belle".EUROPEAN PHYSICAL JOURNAL C 78.11(2018):928.