Charged particle and neutral kaon production in e+e- annihilation at PETRA

W. Bartel, L. Becker, C. Bowdery, D. Cords, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, B. Naroska, J. Olsson, P. Steffen, P. Warming, G. Dietrich, E. Elsen, G. Heinzelmann, H. Kado, K. Meier, A. Petersen, U. Schneekloth, G. WeberS. Bethke, A. Dieckmann, J. Heintze, K. H. Hellenbrand, R. D. Heuer, S. Kawabata, S. Komamiya, J. von Krogh, P. Lennert, H. Matsumura, H. Rieseberg, A. Wagner, A. Finch, F. Foster, G. Hughes, T. Nozaki, H. Wriedt, J. Allison, A. H. Ball, G. Bamford, R. Barlow, I. P. Duerdoth, I. Glendinning, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, P. Rowe, K. Stephens, D. Clarke, R. Marshall, G. F. Pearce, J. B. Whittaker, J. Kanzaki, T. Kobayashi, M. Koshiba, M. Minowa, M. Nozaki, S. Odaka, S. Orito, A. Sato, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

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Abstract

The mean charged multiplicity as well as its distribution has been measured as a function of c.m. energy in the reaction e+e-→hadrons. Fragmentation models are compared with the data. After applying radiative corrections the mean charged multiplicity is measured to be 8.4±0.3±0.6 at 12 GeV, 13.1±0.3±0.6 at 30 GeV and 13.6±0.3±0.6 at 35 GeV. The ratio of mean charged multiplicity to the dispersion (<Nch>/Dch) is almost constant in the energy range studied, indicating KNO scaling of the charged multiplicity. The inclusive differential cross section s(dσ/dxp) shows scaling violation in the high xp region (xp>0.15). The absolute value of the scaling violation is consistent with the result of 2nd order QCD calculations. The production of neutral kaons has been investigated by identifying the decay KS 0→π+π-. The production probability for a strange quark relative to that of a u or d quark in the fragmentation, γs, has been determined to be 0.27±0.03±0.05 averaged over c.m. energies from 12 to 35 GeV. Momentum spectra for neutral kaons are presented and are compared with model predictions.

Original languageEnglish
Pages (from-to)187-206
Number of pages20
JournalZeitschrift für Physik C Particles and Fields
Volume20
Issue number3
DOIs
Publication statusPublished - 1983 Sep

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Bartel, W., Becker, L., Bowdery, C., Cords, D., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Naroska, B., Olsson, J., Steffen, P., Warming, P., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Meier, K., Petersen, A., Schneekloth, U., ... Yanagisawa, C. (1983). Charged particle and neutral kaon production in e+e- annihilation at PETRA. Zeitschrift für Physik C Particles and Fields, 20(3), 187-206. https://doi.org/10.1007/BF01574851