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Determination of decay width error and luminosity in psi(2S) scan
Mo XH(莫晓虎); Zhu YS(朱永生); Mo, XH; Zhu, YS
2001
发表期刊HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
卷号25期号:12页码:1133-1139
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
文章类型Article
摘要The observed cross sections of processes e(+) e(-) --> e(+) e(-), mu (+) mu (-), pi (+) pi (-) J/phi and hadrons at 24 energy points in the vicinity of phi (2 S) resonance have been measured by BES ( Beijing Spectrometer). The resonance cross sections for above four final states take the Breit-Wigner forms. By combining the cross sections of resonance part, continuum(QED or QCD) part and their interferences together with radiative corrections, and then convoluted with the energy spread of BEPC ( Beijing Electron and Positron Collider), the chi (2) fit of these 4 observed cross sections with the assumption of e-mu-tau universality gives the decay widths and branching ratios of phi (2S) : Gamma (t), Gamma (mu), Gamma (h), pi (+)pi (-) (J/phi), B-mu, B-h, Bpi+pi -J/phi. This article mainly describes the methods for calculating the intregral luminosity and for determining the fitting errors of (2S) decay widths and branching ratios in this scan experiment. The intregral luminosity for each energy point is calculated by using the data of e(+)e(-) final state and the iteration method with assumption of lepton universality, that is B-e = B-mu. The errors of decay widths and branching ratios are determined by Monte Carlo sampling method.
关键词psi(2S) particle decay width integrated luminosity iteration sampling
学科领域Physics
研究领域[WOS]Physics ; Physics
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语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000172849500001
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被引频次:2[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/311005/239099
专题实验物理中心
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
Mo XH,Zhu YS,Mo, XH,et al. Determination of decay width error and luminosity in psi(2S) scan[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2001,25(12):1133-1139.
APA 莫晓虎,朱永生,Mo, XH,&Zhu, YS.(2001).Determination of decay width error and luminosity in psi(2S) scan.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,25(12),1133-1139.
MLA 莫晓虎,et al."Determination of decay width error and luminosity in psi(2S) scan".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 25.12(2001):1133-1139.
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