A global fit determination of effective Delta m(31)(2) from baseline dependence of reactor (v)over-bar(e) disappearance

作者：Bezerra T J C; Furuta H; Suekane F^*; Matsubara T

来源：Physics Letters B, 2013, 725(4-5): 271-276.

DOI：10.1016/j.physletb.2013.07.028

Recently, three reactor neutrino experiments, Daya Bay, Double Chooz and RENO have directly measured the neutrino mixing angle theta(13). In this Letter, another important oscillation parameter, effective Delta m(31)(2) (= Delta(m) over tilde (2)(31)) is measured using baseline dependence of the reactor neutrino disappearance. A global fit is applied to publicly available data and Delta(m) over tilde (2)(31) = 2.95(-0.61)(+0.42) x 10(-3) eV(2), sin(2) 2 theta(13) = 0.099(-0.012)(+0.016) are obtained by setting both parameters free. This result is complementary to Delta(m) over tilde (2)(31) to be measured by spectrum shape analysis. The measured Delta(m) over tilde (2)(31) is consistent with Delta(m) over tilde (2)(31) measured by v(mu), disappearance in MINOS, T2K and atmospheric neutrino experiments within errors. The minimum chi(2) is small, which means the results from the three reactor neutrino experiments are consistent with each other.

• 出版日期2013-10