AN INVESTIGATION OF B0D AND B0S OSCILLATION

	AN INVESTIGATION OF B0D AND B0S OSCILLATION
	ALEPH Collaboration
刊名	PHYSICS LETTERS B
	1994
卷号	322 期号:4 页码:#REF!
通讯作者	BUSKULIC, D (reprint author), CNRS, IN2P3, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
英文摘要	B0B0BAR oscillation is studied using almost a million hadronic Z decays collected by the ALEPH experiment at LEP. Events are selected with two leptons present, on opposite sides of the event and with high transverse momentum. The leptons are expected to be dominantly from b decays; a topological vertexing technique is applied to measure the decay length of the b hadrons, and their momentum is determined using an energy-flow method. The fraction of events in which the leptons have the same charge is studied as a function of the measured decay time, and clear evidence is seen for the time-dependent nature of B(d)0B(d)0BAR mixing. The frequency measured for the oscillation corresponds to a mass difference for the B(d)0 mass eigenstates DELTAm(d) = (3.3(+0.5/-0.4) +/- 0.7) x 10(-4) eV/C2. Allowing a second frequency component for the B(s)0 a high value for DELTAm(s) is favoured, leading to the limit DELTAm(s) > 12 x 10(-4) eV/c2 (95% CL), from which (DELTAm/GAMMA)s > 2.0 is derived.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:A1994MY39600022
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227653]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	ALEPH Collaboration. AN INVESTIGATION OF B0D AND B0S OSCILLATION[J]. PHYSICS LETTERS B,1994,322(4):#REF!.
APA	ALEPH Collaboration.(1994).AN INVESTIGATION OF B0D AND B0S OSCILLATION.PHYSICS LETTERS B,322(4),#REF!.
MLA	ALEPH Collaboration."AN INVESTIGATION OF B0D AND B0S OSCILLATION".PHYSICS LETTERS B 322.4(1994):#REF!.