Phys. Rev. Lett.
81,
2428–2431
(1998)
Measurement of the Running of Effective QED Coupling at Large Momentum Transfer in the Spacelike Region
S. Odaka et al. (VENUS Collaboration)
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S. Odaka2,*, K. Abe1, K. Amako2, Y. Arai2, Y. Asano3, M. Chiba4, Y. Chiba5, M. Daigo6,†, M. Fukawa2,‡, Y. Fukushima2, J. Haba2, H. Hamasaki3, Y. Hemmi7, M. Higuchi8, T. Hirose4, Y. Homma9, N. Ishihara2, Y. Iwata10, J. Kanzaki2, R. Kikuchi7, T. Kondo2, T. T. Korhonen2,11,§, H. Kurashige7, E. K. Matsuda12, T. Matsui2, K. Miyake7, S. Mori3, Y. Nagashima13, Y. Nakagawa14,**, T. Nakamura12,††, I. Nakano15, K. Ogawa2,‡‡, T. Ohama2, T. Ohsugi10, H. Ohyama16, K. Okabe15, A. Okamoto7, A. Ono17, J. Pennanen2,11, H. Sakamoto7, M. Sakuda2, M. Sato8, N. Sato2, M. Shioden18, J. Shirai2,a, T. Sumiyoshi2, Y. Takada3, F. Takasaki2, M. Takita13, N. Tamura19, K. Tobimatsu20, T. Tsuboyama2, S. Uehara2, Y. Unno2, T. Watanabe21, Y. Watase2, F. Yabuki4, Y. Yamada2, T. Yamagata14, Y. Yonezawa22, and H. Yoshida23 (VENUS Collaboration)
1Department of Physics, Tohoku University, Sendai 980, Japan
2High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
3Institute of Applied Physics, University of Tsukuba, Tsukuba 305-8573, Japan
4Department of Physics, Tokyo Metropolitan University, Hachioji 192-03, Japan
5Yasuda Women's Junior College, Hiroshima 731-01, Japan
6Faculty of Economics, Toyama University, Toyama 930, Japan
7Department of Physics, Kyoto University, Kyoto 606, Japan
8Department of Applied Physics, Tohoku-Gakuin University, Tagajo 985, Japan
9Faculty of Engineering, Kobe University, Kobe 657, Japan
10Department of Physics, Hiroshima University, Higashi-Hiroshima 724, Japan
11Research Institute for High Energy Physics, Helsinki University, SF-00170 Helsinki, Finland
12Faculty of Engineering, Miyazaki University, Miyazaki 889-2192, Japan
13Department of Physics, Osaka University, Toyonaka 560, Japan
14International Christian University, Mitaka 181, Japan
15Department of Physics, Okayama University, Okayama 700, Japan
16Hiroshima National College of Maritime Technology, Higashino 725-0200, Japan
17Faculty of Cross-Cultural Studies, Kobe University, Kobe 657, Japan
18Ibaraki College of Technology, Katsuta 312, Japan
19Department of Physics, Niigata University, Niigata 950-2181, Japan
20Center for Information Science, Kogakuin University, Tokyo 163-91, Japan
21Department of Physics, Kogakuin University, Hachioji 192, Japan
22Tsukuba College of Technology, Tsukuba 305, Japan
23Naruto University of Education, Naruto 772, Japan
Received 9 June 1998; published in the issue dated 21 September 1998
The q2 running of effective QED coupling α(q2) is measured in a spacelike region, (10GeV)2≤-q2≤(54GeV)2, using Bhabha-scattering and muon-pair production data at e+e- collisions with a center-of-mass energy of 57.77 GeV. The result verifies the prediction of a theoretical estimation with a precision of better than 1% in terms of α(q2)/α(t0) with t0 = -(10GeV)2.
© 1998 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2428
DOI:
10.1103/PhysRevLett.81.2428
*Electronic address: shigeru.odaka@kek.jp †Present address: Faculty of Economics, Doshisha University, Kyoto 602-8580, Japan. ‡Present address: Naruto University of Education, Naruto 772, Japan. §Present address: Paul Scherrer Institute, SLS, CH-5232 Villigen PSI, Switzerland. **Present address: Faculty of Science, Ehime University, Matsuyama 790, Japan. ††Deceased. ‡‡Deceased. aPresent address: Department of Physics, Tohoku University, Sendai 980, Japan.
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