Inclusive γ and π0 production cross sections and energy fractions in e+e- annihilation at 29 GeV

H. Aihara, M. Alston-Garnjost, 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, J. Chiba, 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, H. Iwasaki, 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, H. Videau, E. M. Wang, M. R. Wayne, W. A. Wenzel, H. Yamamoto, M. Yamauchi, W. M. Zhang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Inclusive production cross sections for photons and π0's in e+e- annihilation at a center of mass energy of 29 GeV have been measured. The π0 production spectrum agrees with a corresponding measurement for π±. The ratio of the π0 inclusive rate to the average for π± is 0.92±0.14. The fractions of the total energy carried by photons and π0's are 0.244±0.016 and 0.217±0.033, respectively. The fraction of total energy carried by all stable hadrons, prompt leptons and photons is determined to be 0.938±0.045, leaving 0.062±0.045 for neutrinos.

    Original languageEnglish (US)
    Pages (from-to)187-190
    Number of pages4
    JournalZeitschrift für Physik C Particles and Fields
    Volume27
    Issue number2
    DOIs
    StatePublished - Jun 1985

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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