Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime

	Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime
	Barbosa, RF; Albuquerque, IF; Bondar, NF; Carrigan, R; Chen, D; Cooper, PS; Dai, LS; Denisov, AS; Dobrovolsky, AC; Dubbs, T
刊名	PHYSICAL REVIEW D
	2000
卷号	61 期号:3 页码:31101
通讯作者	Univ Sao Paulo, Inst Fis, BR-05508 Sao Paulo, Brazil ; Fermi Natl Accelerator Lab, Batavia, IL 60510 USA ; Petersburg Nucl Phys Inst, Gatchina, Russia ; Inst High Energy Phys, Beijing 100039, Peoples R China ; Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England ; Carnegie Mellon Univ, Pittsburgh, PA 15213 USA ; Univ Iowa, Iowa City, IA 52242 USA ; Inst Theoret & Expt Phys, Moscow 117259, Russia ; SUNY Albany, Albany, NY 12222 USA ; Univ Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, Brazil ; Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil ; CNPq, Rio De Janeiro, Brazil ; Yale Univ, JW Gibbs Lab, New Haven, CT 06511 USA
英文摘要	We have measured the lifetime of the <(Sigma)over bar>(-) using the Fermilab, Proton Center 375 GeV/c charged hyperon beam. We obtained (80.43+/-0.80+/-0.14) ps. We also measured the lifetime of the Sigma(+), obtaining (80.38 +/-0.40+/-0.14) ps, in agreement with the Particle Data Group value. A direct comparison between the two lifetimes from the ratio of the decay curves gives a fractional lifetime difference of Delta tau/<(tau)over bar>=(-0.06+/-1.12)%, consistent with equal lifetimes for baryon and antibaryon as required by CPT invariance.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000085079600001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240524]
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	Barbosa, RF,Albuquerque, IF,Bondar, NF,et al. Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime[J]. PHYSICAL REVIEW D,2000,61(3):31101.
APA	Barbosa, RF.,Albuquerque, IF.,Bondar, NF.,Carrigan, R.,Chen, D.,...&Zhong, YY.(2000).Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime.PHYSICAL REVIEW D,61(3),31101.
MLA	Barbosa, RF,et al."Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime".PHYSICAL REVIEW D 61.3(2000):31101.