Professor Amanda Cooper-Sarkar

Abstract:

Comparing the kinematical distributions of events obtained on neon and deuterium targets in similar experimental conditions reveals a reduction of the neutrino and antineutrino charged current cross section per nucleon in neon at low Q2. The effect, interpreted as due to geometric shadowing of the weak propagator in interactions of neutrinos and antineutrinos with nuclei, agrees well with predictions derived from PCAC. © 1989.

Abstract:

The coherent production of π+ mesons by charged current neutrino interactions on neon nuclei in BEBC is compared to the predictions of the PCAC hypothesis and the meson dominance model. Good agreement is observed. © 1989 Springer-Verlag.

Abstract:

The production of the meson resonances ρ{variant}(770) (all three charge states), η(550), ω(783) and f2(1270) in {Mathematical expression} Ne and ν Ne charged current interactions is investigated in a bubble chamber experiment with BEBC at CERN. Except for the f2, the main features of resonance production are reasonably well described by the Lund model, although the average resonance multiplicities are overestimated by the model by (67±30)%. The average multiplicities of all resonances, including the f2, are well reproduced by a semiempirical model, whose parameters were determined from hadron interaction data. © 1989 Springer-Verlag.

Abstract:

Backward proton and pion production is studied in ν and {Mathematical expression} charged current interactions in neon. The results are compared with other experiments and theory. The complete backward proton data is compatible with protons produced by reinteractions in the nucleus. However in events with only one proton, muon variables appear correlated to those for the backward proton, as expected by the two-nucleon correlation model. © 1989 Springer-Verlag.