Prompt muon production in e+e - annihilations at 29 GeV

H. Aihara, M. Alston-Garnjost, D. H. Badtke, J. A. Bakken, A. Barbaro-Galtieri, A. V. Barnes, B. A. Barnett, H. U. Bengtsson, B. J. Blumenfeld, A. D. Bross, C. D. Buchanan, O. Chamberlain, C. Y. Chien, A. R. Clark, A. Cordier, O. I. Dahl, C. T. Day, K. A. Derby, P. H. Eberhard, D. L. FancherH. Fujii, T. Fujii, B. Gabioud, J. W. Gary, W. Gorn, N. J. Hadley, J. M. Hauptman, W. Hofmann, J. E. Huth, J. Hylen, D. T. Kamae, H. S. Kaye, R. W. Kenney, L. T. Kerth, R. I. Koda, R. R. Kofler, K. K. Kwong, J. G. Layter, C. S. Lindsey, S. C. Loken, X. Q. Lu, G. R. Lynch, L. Madansky, R. J. Madaras, K. Maruyama, J. N. Marx, J. A.J. Matthews, S. O. Melnikoff, W. Moses, P. Nemethy, D. R. Nygren, P. J. Oddone, D. A. Park, A. Pevsner, M. Pripstein, P. R. Robrish, M. T. Ronan, R. R. Ross, F. R. Rouse, R. R. Sauerwein, G. Shapiro, M. D. Shapiro, B. C. Shen, W. E. Slater, M. L. Stevenson, D. H. Stork, H. K. Ticho, N. Toge, R. F. Van Daalen Wetters, G. J. Van Dalen, R. Van Tyen, E. M. Wang, M. R. Wayne, W. A. Wenzel, H. Yamamoto, M. Yamauchi, W. M. Zhang

    Research output: Contribution to journalArticlepeer-review


    We have studied the production of prompt muons in hadronic events from e +e-annihilation at a center-of-mass energy of 29 GeV with the PEP4-TPC (Time Projection Chamber) detector. The muon p and p, distributions arc well described by a combination of bottom- and charm-quark de-cays, with fitted semimuonic branching fractions of (15.2±1.9±1.2)% and (6.9±1.1±1.1)%, respectively. The muon spectra imply hard fragmentation functions for both b and c quarks, with <zib quark)) =0.80±0.05±0.05 and <z(c quark)) =0.60±0.06±0.c4. We derive neutral-current axial-vector couplings of a(b quark)= -0.9± 1.1±0.3 and a(c quark)= 1.5±1.5±0.5 from the forward-backward asymmetries.

    Original languageEnglish (US)
    Pages (from-to)2719-2723
    Number of pages5
    JournalPhysical Review D
    Issue number11
    StatePublished - 1985

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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