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Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay Lambda(0)(b) -> J/psi Lambda(0) with the ATLAS detector
ATLAS collaboration
2014
发表期刊PHYSICAL REVIEW D
卷号89期号:9
通讯作者Aad, G (reprint author), Univ Aix Marseille, CPPM, Marseille, France.
摘要A measurement of the parity-violating decay asymmetry parameter, ab, and the helicity amplitudes for the decay.Lambda(0)(b) -> J/psi(mu(+) mu(-)) Lambda(0)(p pi(-)) is reported. The analysis is based on 1400 Lambda(0)(b)and (Lambda) over bar (0)(b) baryons selected in 4.6 fb(-1) of proton-proton collision data with a center-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. By combining the.0 b and. _ 0 b samples under the assumption of CP conservation, the value of ab is measured to be 0.30 +/- 0.16(stat) +/- 0.06(syst). This measurement provides a test of theoretical models based on perturbative QCD or heavy-quark effective theory.
关键词WEAK DECAYS ROOT-S=7 TEV POLARIZATION CONSERVATION BARYON COLLISIONS MUON
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.89.092009
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000336651300001
引用统计
被引频次:8[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/311005/213714
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. Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay Lambda(0)(b) -> J/psi Lambda(0) with the ATLAS detector[J]. PHYSICAL REVIEW D,2014,89(9).
APA ATLAS collaboration.(2014).Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay Lambda(0)(b) -> J/psi Lambda(0) with the ATLAS detector.PHYSICAL REVIEW D,89(9).
MLA ATLAS collaboration."Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay Lambda(0)(b) -> J/psi Lambda(0) with the ATLAS detector".PHYSICAL REVIEW D 89.9(2014).
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