ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The rate of neutrino- and antineutrino-induced prompt same-sign dimuon production in steel was measured using a sample of μ−μ− events and 25 μ+μ+ events withP μ〉9 GeV/c, produced in 1.5 millionv μ and 0.3 million $$\overline {v_\mu }$$ induced charged-current events with energies between 30 GeV and 600 GeV. The data were obtained with the Chicago-Columbia-Fermilab-Rochester (CCFR) neutrino detector in the Fermilab Tevatron Quadrupole Triplet Neutrino Beam during experiments E 744 and E 770. After background subtraction, the prompt rate of same-sign dimuon production is (0.53±0.24)×10−4 perv μ charged-current event and (0.52±0.33)×10−4 per $$\overline {v_\mu }$$ charged-current event. The kinematic distributions of the same-sign dimuon events after background subtraction are consistent with those of the non-prompt background due to meson decays in the hadron shower of a charged-current event. Calculations ofc $$\bar c$$ gluon bremsstrahlung, based on improved measurements of the charm mass parameter and nucleon structure functions by the CCFR collaboration, yield a prompt rate of (0.09±0.39)×10−4 perv μ charged-current event. In this case,c $$\bar c$$ gluon bremsstrahlung is probably not an observable source of prompt same-sign dimuons.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01555733
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