Evidence for an  ηc(1S)π−ηc(1S)π−  resonance in  B0→ηc(1S)K+π−B0→ηc(1S)K+π−  decays

doi:10.1140/epjc/s10052-018-6447-z

	Evidence for an ηc(1S)π−ηc(1S)π− resonance in B0→ηc(1S)K+π−B0→ηc(1S)K+π− decays
	LHCb Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2018
卷号	78 期号:12 页码:1019
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-018-6447-z
文献子类	Article
英文摘要	A Dalitz plot analysis of /30 ric(1S)K+7decays is performed using data samples of pp collisions collected with the LHCb detector at centre -of -mass energies of./7 = 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 4.7 fb-1. A satisfactory description of the data is obtained when including a contribution representing an exotic qc (1 S).7-- resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096 20 is MeV and 152 +58 -P6 MeV, respectively. The spin -parity assignments JP = 0+ and JP = 1- are both consistent with the data. In addition, the first measurement of the B -> ric(1S)K+71-branching fraction is performed and gives B(B -> = (5.73 0.24 0.13 0.66) x 10-4, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions.
电子版国际标准刊号	1434-6052
WOS关键词	ISOBAR MODEL ; HIDDEN ; CHARM ; TOOL
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000453398100001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286966]
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	LHCb Collaboration. Evidence for an ηc(1S)π−ηc(1S)π− resonance in B0→ηc(1S)K+π−B0→ηc(1S)K+π− decays[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(12):1019.
APA	LHCb Collaboration.(2018).Evidence for an ηc(1S)π−ηc(1S)π− resonance in B0→ηc(1S)K+π−B0→ηc(1S)K+π− decays.EUROPEAN PHYSICAL JOURNAL C,78(12),1019.
MLA	LHCb Collaboration."Evidence for an ηc(1S)π−ηc(1S)π− resonance in B0→ηc(1S)K+π−B0→ηc(1S)K+π− decays".EUROPEAN PHYSICAL JOURNAL C 78.12(2018):1019.