Showing papers by "Vincenzo Cavasinni published in 1998"

The NOMAD experiment at the CERN SPS

Abstract: The NOMAD experiment is a short base-line search for νμ − ντ oscillations in the CERN neutrino beam. The ντ's are searched for through their charged current interactions followed by the observation of the resulting τ− through its electronic, muonic or hadronic decays. These decays are recognized using kinematical criteria necessitating the use of a light target which enables the reconstruction of individual particles produced in the neutrino interactions. This paper describes the various components of the NOMAD detector: the target and muon drift chambers, the electromagnetic and hadronic calorimeters, the preshower and transition radiation detectors and the veto and trigger scintillation counters. The beam and data acquisition system are also described. The quality of the reconstruction and individual particles is demonstrated through the ability of NOMAD to observe Ks0's, Λ0's and π0's. Finally, the observation of τ− through its electronic decay being one of the most promising channels in the search, the identification of electrons in NOMAD is discussed.

Precision Measurement of Scaled Momentum, Charge Multiplicity and Thrust in νμ N and ν̄μ N Interactions

Abstract: We report the first precision measurements of the scaled momentum, the charge multiplicity, and the thrust of hadronic jets in the Breit frame in Deep Inelastic Scattering νμ N and νμ N charged current events over the Q2 range from 1 to 100 GeV2 . The neutrino data, obtained in the NOMAD experiment at the CERN SPS, extend the Q2-evolution of these parameters by two orders of magnitude, and with commensurate precision, when compared to those reported by the ep and e+e− experiments. (to be published in Physics Letters B)