T. Ruan

Experimental study of opposite-sign dimuons produced in neutrino and antineutrino interactions

A large sample of opposite-sign dimuons, produced by the interaction of neutrinos and antineutrinos in iron, is analysed. The data agree very well with the hypothesis that the extra muon is the product of charm decay. They yield information on the strength and space-time structure of the charmproducing weak current. The strange-sea structure functionxs(x) is determined. The difference between neutrino and antineutrino dimuon production is analysed to provide a value of the Kobayashi-Maskawa weak mixing angleθ2.

Neutrino and antineutrino charged-current inclusive scattering in iron in the energy range 20<E v <300 GeV

AbstractInclusive charged-current interactions of high-energy neutrinos and antineutrinos have been studied with high statistics in a counter experiment at the CERN Super Proton Synchrotron. The energy dependence of the total cross-sections, the longitudinal structure function, and the nucleon structure functionsF2,xF3, and

Determination of the gluon distribution in the nucleon from deep inelastic neutrino scattering

\bar q^{\bar v}

LIMIT ON RIGHT-HANDED WEAK COUPLING PARAMETERS FROM INELASTIC NEUTRINO INTERACTIONS

are determined from these data. The analysis of theQ2-dependence of the structure functions is used to test quantum chromodynamics, to determine the scale parameter Λ and the gluon distribution in the nucleon.

Evidence forΨ production by neutrinos via neutral currents

Abstract The energy resolution and response of a segmented iron-scintillator total absorption calorimeter has been measured for pion energies from 10 to 140 GeV and for electron energies up to 50 GeV. A procedure has been found to weight individual counter responses for hadron showers which results in improved energy resolution at high energies and a nearly linear dependence of response on hadron energy above 30 GeV. There is evidence in the data that this weighting procedure compensates for fluctuations in energy deposition due to the electromagnetic component of the hadronic shower. For an iron sampling thickness of 2.5 cm the hadron energy resolution follows a 0.58 E law, while the resolution for electromagnetic showers is 0.23 E .

A measurement of the ratio of longitudinal and transverse structure functions in neutrino interactions between 30 and 200 GeV

AbstractThe observed scaling violations of the nucleon structure functionF2 and

TESTS OF QCD AND NON-ASYMPTOTICALLY-FREE THEORIES OF THE STRONG INTERACTION BY AN ANALYSIS OF THE NUCLEON STRUCTURE FUNCTIONS XF3, F2, AND Q-BAR

\bar q