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A measurement of the total cross section and a study of inclusive muon production for the process e+e−→ hadrons in the energy range between 39.79 GeV and 46.78 GeV

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1985
<mark>Journal</mark>Physics Letters B
Number of pages6
<mark>Original language</mark>English


The total cross section and the inclusive muon cross section for the process e+e−→ hadrons have been measured in the center of mass energy range between 39.79 and 46.78 GeV. The ratio R shows no significant structure. It has an average value of 4.13±0.08±0.14. An upper limit is set on the production of narrow resonances. Limits are obtained for pair-produced heavy quarks. The data are compared with the standard electroweak interaction model including QCD corrections taking into account the five known types of quarks. Upper limits are given for a possible structure of quarks and for effects of color octet leptons.