1. Measurement ofR and determination of the charged-particle multiplicity ine + e − annihilation at 13-113-113-1around 10 GeV
- Author
-
V. Lubimov, H. Schröder, B. Holzer, W. Schmidt-Parzefall, B. Spaan, A. Nau, Sergey Semenov, W. Funk, Leif J. Jönsson, J. D. Prentice, C. W. Darden, Hermann Kolanoski, Fedor Ratnikov, M. Reidenbach, K. Reim, A. Lindner, T. Oest, K. R. Schubert, Y. Tsipolitis, J. Stiewe, R. S. Orr, D. Reßing, T. Siegmund, Dave Britton, Mikhail Danilov, B. Boštjančič, S. Ball, D. B. MacFarlane, Peter Krieger, K. Strahl, D. Töpfer, Vladislav Balagura, Rainer Mankel, B. Fominykh, F. Sefkow, C. E. K. Charlesworth, R. Mundt, A. Krüger, R. G. Van de Water, R. Waldi, Robert K. Kutschke, H. I. Cronström, C. Geyer, C. Hast, Thomas Hamacher, E. Tzamariudaki, K. T. Knöpfle, V. Soloshenko, H. Thurn, U. Volland, H. Wegener, S. Weseler, R. Childers, A. Droutskoy, G. Herrera, P. Križan, A. Golutvin, S. Khan, A. Rostovtsev, T. Podobnik, A. Lange, Werner Hofmann, Holger Schulz, R. D. Appuhn, Manfred Paulini, D. Wegener, I. Tichomirov, H. Allrecht, A. Hölscher, T. Živko, K. W. Edwards, M. Schieber, H. Ehrlichmann, M. Schäfer, I. V. Gorelov, T. S. Yoon, A. Semenov, J. C. Gabriel, Stefan Schael, Sally Seidel, H. Kapitza, M. Hapke, Yu. Zaitsev, P. M. Patel, S. Werner, E. Križnič, J. Spengler, A. Nippe, G. Kernel, A. Walther, V. Shevchenko, and R. Wurth
- Subjects
Physics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Electron–positron annihilation ,Hadron ,Order (ring theory) ,Elementary particle ,Multiplicity (mathematics) ,Nuclear physics ,High Energy Physics::Experiment ,Production (computer science) ,Continuum (set theory) ,Engineering (miscellaneous) - Abstract
We have measured theR value in non-resonante+e− annihilation using the ARGUS detector at the storage ring DORIS II. At a centre-of-mass energy\(\sqrt s = 9.36\) GeV the ratio of the hadronic cross-section to the μ-pair cross section in lowest order QED has been determined to beR=3.46±0.03±0.13. In addition, we have measured the charged-particle multiplicities in non-resonant hadron production at\(\sqrt s = 10.47\) GeV just below theB\(\bar B\) threshold and in ϒ (4S) resonance decays. For the average charged-particle multiplicities in continuum events and ϒ(4S)→B\(\bar B\) decays we obtain cont=8.35±0.02±0.20 and ϒ(4s)=10.81±0.05±0.23.
- Published
- 1992
- Full Text
- View/download PDF