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Tau hadronic branching ratios
ALEPH Collaboration
1996
发表期刊ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
卷号70期号:4页码:#REF!
通讯作者Buskulic, D (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES, CNRS, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE.
摘要From 64492 selected tau-pair events, produced at the Zeta(o) resonance, the measurement of the tau decays into hadrons from a global analysis using 1991, 1992 and 1993 ALEPH data is presented. Special emphasis is given to the reconstruction of photons and pi(o)'s, and the removal of fake photons. A detailed study of the systematics entering the pi(o) reconstruction is also given. A complete and consistent set of tau hadronic branching ratios is presented for 18 exclusive modes. Most measurements are more precise than the present world average. The new level of precision reached allows a stringent test of tau - mu universality in hadronic decays, g(tau)/g(mu) = 1.0013 +/- 0.0095, and the first measurement of the vector and axial-vector contributions to the non-strange hadronic tau decay width: R(tau,V) = 1.788 +/- 0.025 and R(tau,A) = 1.694 +/- 0.027. The ratio (R(tau,V) - R(tau,A))/(R(tau,V) + R(tau,A)), equal to (2.7 +/- 1.3) %, is a measure of the importance of QCD non-perturbative contributions to the hadronic tau decay width.
文章类型Article
学科领域Physics
DOI10.1007/s002880050134
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:A1996UL96700004
引用统计
被引频次:41[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/311005/227733
专题实验物理中心
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ALEPH Collaboration. Tau hadronic branching ratios[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1996,70(4):#REF!.
APA ALEPH Collaboration.(1996).Tau hadronic branching ratios.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,70(4),#REF!.
MLA ALEPH Collaboration."Tau hadronic branching ratios".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 70.4(1996):#REF!.
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