Final results of (nu)over-bar(e) - e scattering cross-section measurements and constraints on new physics

Deniz M., Bilmis S., Wong H. T.

12th International Conference on Topics in Astroparticle and Underground Physics (TAUP), Munich, Germany, 5 - 09 September 2011, vol.375 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 375
  • Doi Number: 10.1088/1742-6596/375/4/042044
  • City: Munich
  • Country: Germany
  • Middle East Technical University Affiliated: Yes


The (nu) over bar (e) - e elastic scattering cross-section was measured with a CsI(Tl) scintillating crystal detector array with a total mass of 187 kg at the Kuo-Sheng Nuclear Power Station. The detectors were exposed to a reactor (nu) over bar (e) flux of 6.4 x 10(12) cm(-2)s(-1) originated from a core with 2.9 GW thermal power. Using 29882/7369 kg-days of Reactor ON/OFF data, the Standard Model (SM) of electroweak interaction was probed at the 4-momentum transfer range of Q(2) similar to 3 x 10(-6) GeV2. A cross-section ratio of R-expt = [1.08 + 0.21 (stat) + 0.16 (sys)] x R-SM was measured. Constraints on the electroweak parameters (g(V), g(A)) were placed, corresponding to a weak mixing angle measurement of sin(2)theta(W) = 0.251 +/- 0.031 (stat) +/- 0.024 (sys). Destructive interference in the SM (nu) over bar (e)-e processes was verified. Bounds on neutrino anomalous electromagnetic properties (neutrino magnetic moment and neutrino charge radius), as well as non-standard neutrino interactions were placed. We summarize the experimental details and results, and discuss projected sensitivities with realistic and feasible hardware upgrades.