A MEASUREMENT OF SIGMA-TOT (E+E--]HADRONS) FOR CM ENERGIES BETWEEN 12.0 AND 36.7-GEV

A MEASUREMENT OF SIGMA-TOT (E+E--]HADRONS) FOR CM ENERGIES BETWEEN 12.0 AND 36.7-GEV

The ration R = σ(e+e- → hadrons)σμμ was measured between 12.0 and 36.7 GeV c.m. energy W with a precision of typically ± 5.2%. R is found to be constant with an average R = 4.01 ± 0.03 (stat) ± (syst.) for W ≥ 14 GeV. Quarks are found to be point-like, the mass parameter describing a possible quark...

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Detalhes bibliográficos
Principais autores: Brandelik, R, Braunschweig, W, Gather, K, Kirschfink, F, Lubelsmeyer, K, Martyn, H, Peise, G, Rimkus, J, Sander, H, Schmitz, D, Trines, D, Wallraff, W, Boerner, H, Fischer, H, Hartmann, H, Hilger, E, Hillen, W, Knop, G, Kopke, L, Kolanoski, H, Lohr, B, Wedemeyer, R, Wermes, N, Wollstadt, M, Burkhardt, H
Formato: Journal article
Idioma:English
Publicado em: 1982
Descrição
Resumo:The ration R = σ(e+e- → hadrons)σμμ was measured between 12.0 and 36.7 GeV c.m. energy W with a precision of typically ± 5.2%. R is found to be constant with an average R = 4.01 ± 0.03 (stat) ± (syst.) for W ≥ 14 GeV. Quarks are found to be point-like, the mass parameter describing a possible quark form-factor being larger than 186 GeV. Fits including QCD corrections and a weak neutral-current contribution are presented. © 1982.

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