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Study of tau decays involving kaons, spectral functions and determination of the strange quark mass

文献类型：期刊论文

作者ALEPH Collaboration
刊名EUROPEAN PHYSICAL JOURNAL C
出版日期1999
卷号11期号:4页码:599-618
关键词RENORMALIZATION-GROUP ANALYSIS RESONANCE PHYSICS RADIATIVE-CORRECTIONS PERTURBATIVE QCD CHIRAL-SYMMETRY LEPTON DECAY LATTICE QCD SUM-RULES LIGHT BREAKING
通讯作者Barate, R (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74019 Annecy Le Vieux, France.
英文摘要All ALEPH measurements of branching ratios of tau decays involving kaons are summarized including a combination of results obtained with K(s)(0) and K(L)(0) detection. The decay dynamics are stud led, leading to the determination of contributions from vector K*(892) and K*(1410), and axial-vector K(1)(1270) and K(1)(1400) resonances. Agreement with isospin symmetry is observed among the different final states. Under the hypothesis of the conserved vector current! the spectral function for the mode is compared with the corresponding cross section for low energy e(+)e(-) annihilation, yielding an axial-vector fraction of (94(-8)(+6))% for this mode. The branching ratio for tau decay into all strange final states is determined to be B(tau(-) --> X(-) (S = -1)nu(tau)) = (28.7 +/- 1.2) x 10(-3). The measured mass spectra of the strange tau decay modes are exploited to derive the S = -1 spectral function. A combination of strange and nonstrange spectral functions is used to determine the strange: quark mass and nonperturbative contributions to the strange hadronic width. A method is developed to avoid the bad convergence of the spin zero hadronic component, with the result m(s)(M(tau)(2)) = (176(-57)(+46)) MeV/c(2). The evolution down to 1 GeV gives m(s)(1 GeV(2)) = (234(-76)(+61)) MeV/c(2).
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:000084716200003
公开日期2016-02-25
源URL[http://ir.ihep.ac.cn/handle/311005/212012]  
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 tau decays involving kaons, spectral functions and determination of the strange quark mass[J]. EUROPEAN PHYSICAL JOURNAL C,1999,11(4):599-618.
APA ALEPH Collaboration.(1999).Study of tau decays involving kaons, spectral functions and determination of the strange quark mass.EUROPEAN PHYSICAL JOURNAL C,11(4),599-618.
MLA ALEPH Collaboration."Study of tau decays involving kaons, spectral functions and determination of the strange quark mass".EUROPEAN PHYSICAL JOURNAL C 11.4(1999):599-618.

入库方式： OAI收割

来源：高能物理研究所

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