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Observation of an Excited B-c(+/-) Meson State with the ATLAS Detector
ATLAS Collaboration
2014
发表期刊PHYSICAL REVIEW LETTERS
卷号113期号:21
通讯作者Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
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).
关键词B-C MESON SPECTROSCOPY EQUATION
学科领域Physics
DOI10.1103/PhysRevLett.113.212004
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000345745800002
引用统计
被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213824
专题实验物理中心
作者单位中国科学院高能物理研究所
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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).
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