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Inclusive γ and π0 production cross sections and energy fractions ine + e − annihilation at 29 GeV

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Zeitschrift für Physik C Particles and Fields

Abstract

Inclusive production cross sections for photons and π0's ine + 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.

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Authors and Affiliations

  1. Lawrence Berkeley Laboratory, University of California, 94720, Berkeley, CA, USA

    M. Alston-Garnjost, A. Barbaro-Galtieri, A. V. Barnes, A. D. Bross, O. Chamberlain, A. R. Clark, A. Cordier, O. I. Dahl, C. T. Day, K. A. Derby, P. H. Eberhard, D. L. Fancher, B. Gabioud, J. W. Gary, N. J. Hadley, J. M. Hauptman, W. Hofmann, J. E. Huth, H. S. Kaye, R. W. Kenney, L. T. Kerth, S. C. Loken, G. R. Lynch, R. J. Madaras, J. N. Marx, W. Moses, P. Nemethy, D. R. Nygren, P. J. Oddone, M. Pripstein, P. R. Robrish, M. T. Ronan, R. R. Ross, F. R. Rouse, R. R. Sauerwein, G. Shapiro, M. D. Shapiro, M. L. Stevenson, R. van Tyen, H. Videau, E. M. Wang, M. R. Wayne & W. A. Wenzel

  2. University of California, 90024, Los Angeles, CA, USA

    H. -U. Bengtsson, C. D. Buchanan, R. I. Koda, D. A. Park, W. E. Slater, D. H. Stork, H. K. Ticho & R. F. van Daalen Wetters

  3. University of California, 92521, Riverside, CA, USA

    W. Gorn, K. K. Kwong, J. G. Layter, C. S. Lindsey, S. O. Melnikoff, B. C. Shen & G. J. van Dalen

  4. Johns Hopkins University, 21218, Baltimore, MD, USA

    J. A. Bakken, B. A. Barnett, B. J. Blumenfeld, C-Y. Chien, J. Hylen, X-Q. Lu, L. Madansky, J. A. J. Matthews, A. Pevsner & W-M. Zhang

  5. University of Massachusetts, 01003, Amherst, MA, USA

    R. R. Kofler

  6. University of Tokyo, Tokyo 113, Japan

    H. Aihara, J. Chiba, H. Fujii, T. Fujii, H. Iwasaki, T. Kamae, K. Maruyama, N. Toge, H. Yamamoto & M. Yamauchi

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  1. H. Aihara
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  2. M. Alston-Garnjost
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  3. J. A. Bakken
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  4. A. Barbaro-Galtieri
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  5. A. V. Barnes
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  6. B. A. Barnett
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  7. H. -U. Bengtsson
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  10. C. D. Buchanan
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  19. P. H. Eberhard
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  21. H. Fujii
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  30. J. Hylen
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  31. H. Iwasaki
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  32. T. Kamae
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  33. H. S. Kaye
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  36. R. I. Koda
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  37. R. R. Kofler
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  38. K. K. Kwong
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  39. J. G. Layter
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  40. C. S. Lindsey
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  41. S. C. Loken
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  70. R. F. van Daalen Wetters
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Aihara, H., Alston-Garnjost, M., Bakken, J.A. et al. Inclusive γ and π0 production cross sections and energy fractions ine + e − annihilation at 29 GeV. Z. Phys. C - Particles and Fields 27, 187–190 (1985). https://doi.org/10.1007/BF01556608

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  • DOI: https://doi.org/10.1007/BF01556608

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