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Search for the substructure of leptons in high energy QED processes at tristan

  • S. K. Kim
  • , H. J. Kim
  • , J. S. Kang
  • , M. H. Lee
  • , S. S. Myung
  • , A. Bacala
  • , R. Imlay
  • , P. Kirk
  • , J. Lim
  • , R. R. McNeil
  • , W. Metcalf
  • , C. P. Cheng
  • , J. Li
  • , Y. K. Li
  • , Z. P. Mao
  • , Y. T. Xu
  • , Y. C. Zhu
  • , A. Abashian
  • , K. Gotow
  • , E. H. Low
  • M. E. Mattson, F. Naito, L. Piilonen, K. L. Sterner, S. Lusin, C. Rosenfeld, A. T.M. Wang, S. Wilson, M. Frautschi, H. Kagan, R. Kass, C. G. Trahern, Winston Ko, R. L. Lander, K. Maeshima, R. L. Malchow, J. R. Smith, K. Sparks, M. C.S. Williams, K. Abe, Y. Fujii, Y. Higashi, Y. Kurihara, A. Maki, T. Nozaki, T. Omori, H. Sagawa, Y. Sakai, Y. Sugimoto, Y. Takaiwa, S. Terada, K. Tsuchiya, F. Kajino, D. Perticone, R. Poling, T. Thomas, I. H. Park, S. Schnetzer, J. Green, S. Sakamoto, F. Sannes, R. Stone, S. Trentalange, J. Vinson, Y. Ishi, K. Miyano, H. Miyata, Y. Yamashita, D. Blanis, A. Bodek, H. Budd, R. Coombes, S. Eno, C. A. Fry, H. Harada, Y. H. Ho, Y. K. Kim, T. Kumita, T. Mori, S. L. Olsen, P. Perez, A. Sill, N. M. Shaw, E. H. Thorndike, K. Ueno, H. W. Zheng, K. Eguchi, H. Itoh, H. Ichinose, S. Kobayashi, A. Murakami, K. Toyoshima, G. N. Kim, E. J. Kim, D. Son, H. Kozuka, S. Matsumoto, T. Sasaki, T. Takeda, R. Tanaka, R. Chiba, S. Igarashi, H. Yokota, T. Ishizuka, K. Ohta
  • Korea University
  • Louisiana State University
  • CAS - Institute of High Energy Physics
  • Virginia Polytechnic Institute and State University
  • University of South Carolina
  • Ohio State University
  • University of California at Davis
  • High Energy Accelerator Research Organization, Tsukuba
  • Konan University
  • University of Minnesota Twin Cities
  • Rutgers - The State University of New Jersey, New Brunswick
  • Niigata University
  • Nihon Dental College
  • University of Rochester
  • University of Tsukuba
  • Saga University
  • Kyungpook National University
  • Chuo University
  • Institute of Science Tokyo
  • Saitama University

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

QED processes up to O(α4) have been studied at center-of-mass energies between 50 and 57 GeV using the AMY detector at TRISTAN. A possible substructure of the electron and muon is investigated in terms of chiral invariant contact interactions and also in terms of excited lepton production. The differential cross section data for e+e-→e+e- are consistent with the standard model at a confidence level of only 3.5%. From the absence of excited lepton production, we establish new upper limits on the coupling to excited electrons of mass up to 56 GeV/c2 and on the coupling to excited muons of mass up to 52 GeV/c2.

Original languageEnglish
Pages (from-to)476-484
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume223
Issue number3-4
DOIs
StatePublished - 15 Jun 1989

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