Determination of semi-muonic branching ratios and fragmentation functions of heavy quarks in e+e- annihilation at {Mathematical expression}=34.6 GeV

W. Bartel, L. Becker, R. Felst, D. Haidt, G. Knies, H. Krehbiel, P. Laurikainen, N. Magnussen, R. Meinke, B. Naroska, J. Olsson, D. Schmidt, P. Steffen, T. Greenshaw, J. Hagemann, G. Heinzelmann, H. Kado, C. Kleinwort, M. Kuhlen, A. PetersenR. Ramcke, U. Schneekloth, G. Weber, K. Ambrus, S. Bethke, A. Dieckmann, E. Elsen, J. Heintze, K. H. Hellenbrand, S. Komamiya, J. von Krogh, H. Rieseberg, H. v. d. Schmitt, L. Smolik, J. Spitzer, A. Wagner, M. Zimmer, C. K. Bowdery, A. J. Finch, F. Foster, G. Hughes, J. M. Nye, I. W. Walker, J. Allison, R. J. Barlow, J. Chrin, I. P. Duerdoth, F. K. Loebinger, A. A. Macbeth, H. E. Mills, P. G. Murphy, K. Stephens, P. Warming, R. G. Glasser, P. Hill, J. A.J. Skard, S. R. Wagner, G. T. Zorn, S. L. Cartwright, D. Clarke, R. Marshall, R. P. Middleton, K. Kawagoe, T. Mashimo, T. Takeshita, S. Yamada

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Abstract

Muon inclusive multihadronic final states in e+e- annihilation at {Mathematical expression}=34.6 GeV, collected by the JADE detector at PETRA, have been analysed in terms of the semi-muonic branching ratios and fragmentation functions of heavy quarks. Defining the fragmentation variable, ζ, as {Mathematical expression} we find <zc>=(77±3±5)% and <zb>=(86±4±5)%. The corresponding semi-muonic branching ratios are measured to be BR(c→μvμX)=7.8±1.5±2)% and BR (b→μvμX)=(11.7±1.6±1.5)%. Defining ζ as {Mathematical expression} we observe an expected softening effect in the fragmentation due mainly to gluon emission, but find that this definition leads to semi-muonic branching ratiomeasurements which are strongly affected by uncertainties in the fragmentation process and the WCD calculation.

Original languageEnglish
Pages (from-to)339-349
Number of pages11
JournalZeitschrift für Physik C Particles and Fields
Volume33
Issue number3
DOIs
Publication statusPublished - Sep 1987
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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