Measurement of ${\sin }^{2}2{\theta }_{13}$ by reactor experiments and its sensitivity

Abstract

Reactor experiments offer a promising way to determine ${\theta }_{13}$ and are free from parameter degeneracies in neutrino oscillations. It is described how reactor measurements of ${\sin }^{2}2{\theta }_{13}$ can be improved by a near-far detector complex. The experimental lower bound is derived on the sensitivity to ${\sin }^{2}2{\theta }_{13}\gtrsim 0.02$ based on the rate analysis, and an idea is given which may enable us to circumvent this bound. It is shown that in the Kashiwazaki-Kariwa plan (KASKA) the sensitivity to ${\sin }^{2}2{\theta }_{13}$ is approximately 0.02.

Comments: 8 pages, 2 sets of figures, uses ws-procs9x6.cls. Talk presented at Coral Gables Conference On Lauching Of Belle Epoque In High-Energy Physics And Cosmology (CG 2003), 17-21 Dec 2003, Ft. Lauderdale, Florida