The ν̄e-e- elastic scattering cross section was measured with a CsI(Tl) scintillating crystal array having a total mass of 187 kg. The detector was exposed to an average reactor ν̄e flux of 6.4×1012cm-2s-1 at the Kuo-Sheng Nuclear Power Station. The experimental design, conceptual merits, detector hardware, data analysis, and background understanding of the experiment are presented. Using 29882/7369kg-days of Reactor ON/OFF data, the standard model (SM) electroweak interaction was probed at the squared 4-momentum transfer range of Q2∼3×10-6GeV2. The ratio of experimental to SM cross sections of ξ=[1.08±0.21(stat)±0.16(sys)] was measured. Constraints on the electroweak parameters (gV,gA) were placed, corresponding to a weak mixing angle measurement of sin∑2θW=0. 251±0.031(stat)±0.024(sys). Destructive interference in the SM ν̄e-e process was verified. Bounds on anomalous neutrino electromagnetic properties were placed: neutrino magnetic moment at μν̄e<2. 2×10-10μB and the neutrino charge radius at -2.1×10-32cm2< rν̄e2 <3.3×10 -32cm2, both at 90% confidence level.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 5 Apr 2010|