Determination of sin(2) theta(eff)(w) using jet charge measurements in hadronic Z decays
ALEPH Collaboration
刊名ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
1996
卷号71期号:3页码:#REF!
学科分类Physics
通讯作者Buskulic, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
文章类型Article
英文摘要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.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:A1996VC87400001
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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
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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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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