Final results on the neutrino magnetic moment from the MUNU experiment
/ Authors
T. M. C. Z. Daraktchieva, C. Amsler, M. Avenier, C. Broggini, J. Busto, C. Cerna, F. Juget, D.H.Koang, J. Lamblin, D. Lebrun
and 6 more authors
O. Link, G. Puglierin, A. Stutz, A. Tadsen, J. Vuilleumier, V. Zacek
/ Abstract
Abstract The MUNU detector was designed to study ν ¯ e e − elastic scattering at low energy. The central component is a Time Projection Chamber filled with CF 4 gas, surrounded by an anti-Compton detector. The experiment was carried out at the Bugey (France) nuclear reactor. In this Letter we present the final analysis of the data recorded at 3 bar and 1 bar pressure. Both the energy and the scattering angle of the recoil electron are measured. From the 3 bar data a new upper limit on the neutrino magnetic moment μ e short 9 × 10 −11 μ B at 90% CL was derived. At 1 bar electron tracks down to 150 keV were reconstructed, demonstrating the potentiality of the experimental technique for future applications in low energy neutrino physics.
Journal: Physics Letters B