Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays

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	Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays
	ALEPH Collaboration
	1996
发表期刊	ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
卷号	71 期号:3 页码:#REF!
通讯作者	Buskulic, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
摘要	The electroweak mixing angle is determined with high precision from measurements of the mean difference between forward and backward hemisphere charges in hadronic decays of the Z. A data sample of 2.5 million hadronic Z decays recorded over the period 1990 to 1994 in the ALEPH detector at LEP is used. The mean charge separation between event hemispheres containing the original quark and antiquark is measured for b (b) over bar and c (c) over bar events in subsamples selected by their long lifetimes or using fast D*'s. The corresponding average charge separation for light quarks is measured in an inclusive sample from the anticorrelation between charges of opposite hemispheres and agrees with predictions of hadronisation models with a precision of 2%. It is shown that differences between light quark charge separations and the measured average can be determined using hadronisation models, with systematic uncertainties con strained by measurements of inclusive production of kaons, protons and Lambda's. The separations are used to measure the electroweak mixing angle precisely as sin(2) theta(w)(eff) = 0.2322 +/- 0.0008(exp. stat.) +/-0.0007(exp. syst.) +/- 0.0008(sep.). The first two errors are due to purely experimental sources whereas the third stems from uncertainties in the quark charge separations.
文章类型	Article
学科领域	Physics
收录类别	SCI
WOS类目	Physics, Particles & Fields
WOS记录号	WOS:A1996VC87400001
引用统计	被引频次：11[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/311005/227581
专题	实验物理中心
推荐引用方式 GB/T 7714	ALEPH Collaboration. Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1996,71(3):#REF!.
APA	ALEPH Collaboration.(1996).Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,71(3),#REF!.
MLA	ALEPH Collaboration."Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 71.3(1996):#REF!.

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