Search for isolated leptons in low-thrust e+e- annihilation events at s=50 and 52 GeV

S. Igarashi, S. S. Myung, R. Chiba, K. Hanaoka, M. Miyashita, H. Murata, H. Yokota, A. Bacala, R. Imlay, P. Kirk, R. R. McNeil, W. Metcalf, C. P. Cheng, Z. P. Mao, Y. Yan, Y. T. Xu, H. S. Zhou, Y. C. Zhu, A. Abashian, K. GotowF. Kajino, F. Naito, R. Childers, C. Darden, J. Edwards, S. Lusin, C. Rosenfeld, S. Wilson, D. Johnson, M. Frautschi, H. Kagan, R. Kass, C. G. Trahern, H. Y. Lee, Winston Ko, R. L. Lander, K. Maeshima, R. L. Malchow, K. Sparks, M. C.S. Williams, K. Abe, S. Chakrabarti, Y. Fujii, Y. Higashi, S. Ishimoto, Y. Kurihara, A. Maki, T. Nozaki, T. Omori, P. Perez, H. Sagawa, Y. Sakai, Y. Sugimoto, Y. Takaiwa, S. Terada, K. Tsuchiya, R. Poling, A. Aldritch, J. Green, I. H. Park, S. Sakamoto, F. Sannes, S. Schnetzer, R. Stone, S. Trentalange, D. Zimmerman, K. Miyano, H. Miyata, M. Ogawa, 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, N. M. Shaw, A. Sill, E. H. Thorndike, K. Ueno, H. W. Zheng, H. Asakura, K. Eguchi, H. Itoh, S. Kobayashi, A. Murakami, K. Toyoshima, J. S. Kang, H. J. Kim, S. K. Kim, M. H. Lee, E. J. Kim, G. N. Kim, D. Son, H. Kozuka

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23 Scopus citations

Abstract

Multihadronic e+e- annihilation events containing final-state leptons have been investigated with a 4.7-pb-1 data sample at c.m. energies of 50 and 52 GeV. The number of low-thrust events (T0.8) with isolated leptons is consistent with the expectation of the standard model with five quark flavors. Limits on the production of new quarks and leptons are reported.

Original languageEnglish (US)
Pages (from-to)2359-2362
Number of pages4
JournalPhysical review letters
Volume60
Issue number23
DOIs
StatePublished - 1988

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