Systematic limits on sin^2{2theta_{13}} in neutrino oscillation   experiments with multi-reactors
  Sensitivities to sin^2{2theta_{13}} without statistical errors (``systematic limit'') are investigated in neutrino oscillation experiments with multiple reactors. Using an analytical approach, we show that the systematic limit on sin^2{2theta_{13}} is dominated by the uncorrelated systematic error sigma_u of the detector. Even in an experiment with multi-detectors and multi-reactors, it turns out that most of the systematic errors including the one due to the nature of multiple sources is canceled as in the case with a single reactor plus two detectors, if the near detectors are placed suitably. The case of the KASKA plan (7 reactors and 3 detectors) is investigated in detail, and it is explicitly shown that it does not suffer from the extra uncertainty due to multiple reactors. 
H. Sugiyama (KEK, Tsukuba), O. Yasuda (Tokyo Metropolitan U.), F.   Suekane (Tohoku U.), G. A. Horton-Smith (Kansas State U.)