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Featured researches published by H. S. Mao.


Physical Review D | 2002

First measurement of the branching fraction of the decay ψ(2S)→τ+τ-

J. Z. Bai; Y. Ban; J.G. Bian; I. Blum; A.D. Chen; H. F. Chen; H. S. Chen; J. Chen; J. C. Chen; X. Chen; Y. B. Chen; B. S. Cheng; S.P. Chi; Y. P. Chu; J. B. Choi; X.Z. Cui; Y.S. Dai; L. Y. Dong; Z.Z. Du; W. Dunwoodie; H.Y. Fu; L. P. Fu; C.S. Gao; P. Gratton; S.D. Gu; Y. F. Gu; Y. Guo; Z. J. Guo; S. Han; Y. Han

The branching fraction of the ψ(2S) decay into τ+τ− has been measured for the first time using the BES detector at the Beijing Electron-Positron Collider. The result is Bττ = (2.71± 0.43± 0.55)× 10−3 , where the first error is statistical and the second is systematic. This value, along with those for the branching fractions into e+e− and μ+μ− of this resonance, satisfy well the relation predicted by the sequential lepton hypothesis. Combining all these values with the leptonic width of the resonance, the total width of the ψ(2S) is determined to be (252±37) keV. PACS numbers: 13.20.Gd, 14.40.Gx, 14.60.-z, 14.60.Fg Typeset using REVTEX


High Energy Physics and Nuclear Physics | 1996

Determination of the Total Width of P - Wave Charmonium State χc0

J. Z. Bai; O. Bardon; I. Blum; A. Breakstone; T. Burnett; Guang-Pei Chen; G. P. Chen; H. F. Chen; J. Chen; S. M. Chen; Y. Q. Chen; Y. B. Chen; B. S. Cheng; R. F. Cowan; X.Z. Cui; H. L. Ding; Z.Z. Du; W. Dunwoodie; X. L. Fan; J. Fang; M. Fero; C.S. Gao; M. L. Gao; S. Q. Gao; P. Gratton; J. H. Gu; S.D. Gu; W. X. Gu; Y. F. Gu; Y. Guo


High Energy Physics and Nuclear Physics | 1996

Determination of J/ψ Leptonic Branching Fraction Via ψ (2S) → π+π- J/ψ

J. Z. Bai; O. Bardon; I. Blum; A. Breakstone; T. Burnett; J. Campbell; G. P. Chen; H. F. Chen; J. Chen; S. Chen; S. M. Chen; Y. B. Chen; Y. Q. Chen; B. S. Cheng; R. F. Cowan; H.C. Cui; X.Z. Cui; H. L. Ding; Z.Z. Du; W. Dunwoodie; X. L. Fan; J. Fang; M. Fero; C.S. Gao; M. L. Gao; S. Q. Gao; W.X. Gao; P. Gratton; J. H. Gu; S.D. Gu


High Energy Physics and Nuclear Physics | 1996

Measurement of DS Decay Constant BES Collaboration

J. Z. Bai; O. Bardon; I. Blum; A. Breakstone; T. Burnett; G. P. Chen; H. F. Chen; J. Chen; S. M. Chen; Y. B. Chen; Y. Q. Chen; B. S. Cheng; R. F. Cowan; X.Z. Cui; H. L. Ding; Z.Z. Du; W. Dunwoodie; X. L. Fan; J. Fang; M. Fero; C.S. Gao; M. L. Gao; S. Q. Gao; P. Gratton; J. H. Gu; S.D. Gu; W. X. Gu; Y. F. Gu; Y. Guo; S. Han


High Energy Physics and Nuclear Physics | 1996

Study of ψ(2S) Decays into ρπ and KK

J. Z. Bai; O. Bardon; I. Blum; A. Breakstone; T. Burnett; Guang-Pei Chen; G. P. Chen; H. F. Chen; J. Chen; S. M. Chen; Y. B. Chen; Y. Q. Chen; B. S. Cheng; R. F. Cowan; X.Z. Cui; H. L. Ding; Z.Z. Du; W. Dunwoodie; X. L. Fan; J. Fang; M. Fero; C.S. Gao; M. L. Gao; S. Q. Gao; P. Gratton; J. H. Gu; S.D. Gu; W. X. Gu; Y. F. Gu; Y. Guo

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H. F. Chen

University of Science and Technology of China

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J. Z. Bai

Chinese Academy of Sciences

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Y. B. Chen

Chinese Academy of Sciences

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I. Blum

University of Texas at Dallas

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J. Chen

Colorado State University

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W. Dunwoodie

Arizona State University

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M. Fero

Chinese Academy of Sciences

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G. P. Chen

Queen Mary University of London

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H. L. Ding

Queen Mary University of London

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