A. Capone

Parametrization of Proton Structure Functions

Abstract We present a parametrization of the parton densities as derived from the data collected by the CHARM Collaboration in the wide band beam neutrino and antineutrino weak charged-current interactions. They are rescaled to the proton and calculated at a reference Q 2 value of 10 GeV 2 including the next-to-leading order corrections and imposing the Gross-Llewellyn Smith and the momentum sum rules.

TEST RESULTS OF THE STREAMER TUBE SYSTEM OF THE CHARM-II NEUTRINO DETECTOR

Abstract The CHARM II Collaboration is building a massive, fine-grained and low-density detector for the study of neutrino-electron scattering. Its target calorimeter consists of 441 detector planes with 155 232 plastic streamer tubes with digital readout of the wires and analog readout of external pickup strips. At the time of this report, about 25% of the calorimeter planes were equipped with electronics. Results on the performance of these tubes are presented as obtained with cosmic-rays and with electron and pion beams. We have also investigated the use of water vapour as an additive to the gas to suppress coating of the anode wires. The use of water would be of particular importance when using the tubes in a high-rate environment.

Total Cross-sections of Charged Current Neutrino and Anti-neutrino Interactions on Isoscalar Nuclei

AbstractNew measurements of the total crosssections of charged-current interactions of muonneutrinos and antineutrinos on isoscalar nuclei have been performed. Data were recorded in an exposure of the CHARM detector in an 160 GeV narrow-band beam. The antineutrino flux was determined from the measurements of the pion and kaon flux, and independently from the muon flux measured in the shield; the two methods are found to agree. The neutrino flux was determined from the muon flux ratio forvμ andn

A search for neutrino oscillations

bar v_mu

Experimental study of x-distributions in semileptonic neutral-current neutrino and antineutrino reactions

n runs which was normalized to the antineutrino flux. The cross-section slopes thus determined aren

Prompt neutrino production in 400 GeV proton-copper interactions

begin{gathered} sigma _T^{bar v} /E = (0.335 pm 0.004(stat) hfill pm 0.010(syst)).10^{ - 38} cm^2 /(GeV cdot nucleon) hfill sigma _T^v /E = (0.686 pm 0.002(stat) hfill pm 0.020(syst)).10^{ - 38} cm^2 /(GeV cdot nucleon) hfill end{gathered}