Measurements of cross sections and charge asymmetries for e+e-→τ+τ-and e+e-→μ+μ-for s from 52 to 57 GeV

A. Bacala, R. L. Malchow, K. Sparks, R. Imlay, P. Kirk, R. R. McNeil, W. Metcalf, Winston Ko, R. L. Lander, K. Maeshima, J. R. Smith, M. C.S. Williams, C. P. Cheng, J. Li, Y. K. Li, Z. P. Mao, Y. Yan, Y. T. Xu, Y. C. Zhu, A. AbashianK. Gotow, F. Kajino, E. Low, F. Naito, L. Piilonen, R. Childers, C. Darden, S. Lusin, C. Rosenfeld, A. Wang, S. Wilson, M. Frautschi, H. Kagan, R. Kass, C. G. Trahern, K. Abe, S. Chakrabarti, Y. Fujii, Y. Higashi, Y. Kurihara, A. Maki, T. Nozaki, T. Omori, P. Perez, H. Sagawa, Y. Sakai, Y. Sugimoto, Y. Takaiwa, S. Terada, K. Tsuchiya, R. Poling, 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, S. S. Myung, E. J. Kim, G. N. Kim, D. Son, H. Kozuka, S. Matsumoto, T. Sasaki, T. Takeda, R. Tanaka, R. Chiba, K. Hanaoka, S. Igarashi, H. Murata, H. Yokota, Y. Ishi, T. Ishizuka, K. Ohta

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Abstract

Measurements of the differential cross sections for e+e-→μ+μ- and e+e-→τ+τ- at values of s from 52 to 57 GeV are reported. The forward-backward asymmetries and the total cross sections for these reactions are found to be in agreement with predictions of the standard model of the electro-weak interactions. These measurements are used to extract values of the weak coupling constant gv egv l and gA egA l, where l = μ or τ.

Original languageEnglish
Pages (from-to)112-118
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume218
Issue number1
DOIs
StatePublished - 9 Feb 1989

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