Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector

	Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector
	ATLAS Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2014
卷号	113 期号:21
关键词	B-C MESON SPECTROSCOPY EQUATION
通讯作者	Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
英文摘要	A search for excited states of the B-c(+/-) meson is performed using 4.9 fb(-1) of 7 TeV and 19.2 fb(-1) of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decayB(c)(+/-) -> J/psi pi(+/-). The state appears in the m(B-c(+/-)pi(+)pi(-)) - m(B-c(+/-)) - 2m(pi(+/-)) mass difference distribution with a significance of 5.2 standard deviations. The mass of the observed state is 6842 +/- 4 +/- 5 MeV, where the first error is statistical and the second is systematic. The mass and decay of this state are consistent with expectations for the second S-wave state of the B-c(+/-) meson, B-c(+/-)(2S).
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000345745800002
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213824]
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	ATLAS Collaboration. Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector[J]. PHYSICAL REVIEW LETTERS,2014,113(21).
APA	ATLAS Collaboration.(2014).Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector.PHYSICAL REVIEW LETTERS,113(21).
MLA	ATLAS Collaboration."Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector".PHYSICAL REVIEW LETTERS 113.21(2014).