Study of B-s(0) oscillations and lifetime using fully reconstructed D-s(-) decays

	Study of B-s(0) oscillations and lifetime using fully reconstructed D-s(-) decays
	ALEPH Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	1998
卷号	4 期号:3 页码:367-385
关键词	PHYSICS
通讯作者	Barate, R (reprint author), IN2P3, CNRS, LAPP, F-74019 Annecy Le Vieux, France.
英文摘要	A search for B-s(o) oscillations is performed using approximately 4 million Z --> q (q) over bar events collected by the ALEPH experiment during 1991-1995. B-s(o) candidates are partially reconstructed by combining tracks with fully reconstructed D-s(-) candidates. The B-s(o) production flavour is estimated from the sign of the opposite hemisphere charge, a fragmentation kaon in the same hemisphere, or a lepton in the opposite hemisphere. From a total sample of 1620 candidates, with a B-s(o) purity estimated to be 22%, all values of Delta m(s) below 3.9 ps(-1) and between 6.5 and 8.8 ps(-1) are excluded at 95% CL. From the same sample, the B-s(o) lifetime is measured to be tau(s) = 1.47 +/- 0.14(stat) +/- 0.08(syst) ps. This analysis selects mainly hadronic B-s(o) decays and is statistically independent of a previous ALEPH analysis selecting B-s(o) --> D-s((*)-) rho(+)upsilon candidates. Combining these two analyses yields Delta m(s) > 7.9 ps(-1) at 95% CL and tau(s) = 1.51 +/- 0.11 ps.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000075027200001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/211925]
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	ALEPH Collaboration. Study of B-s(0) oscillations and lifetime using fully reconstructed D-s(-) decays[J]. EUROPEAN PHYSICAL JOURNAL C,1998,4(3):367-385.
APA	ALEPH Collaboration.(1998).Study of B-s(0) oscillations and lifetime using fully reconstructed D-s(-) decays.EUROPEAN PHYSICAL JOURNAL C,4(3),367-385.
MLA	ALEPH Collaboration."Study of B-s(0) oscillations and lifetime using fully reconstructed D-s(-) decays".EUROPEAN PHYSICAL JOURNAL C 4.3(1998):367-385.