ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract Using the ARGUS detector at thee + e − storage ring DORIS-II, we have observed the decays of γ(9,460) andΥ'(10,023) into muon pairs. The ratio of the two observed rates determines Bμμ(γ') largely independent of acceptance uncertainties and absolute luminosity calibration, ifB μμ(γ) is known. From data with an integrated luminosity of 6.11/pb on the γ and 9.93/pb on the γ, using the present world averageB μμ(γ)=(2.9±0.2)%, we obtainB μμ(γ)=(1.57±0.59±0.68)%.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01550247
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