Search for the disappearance of muon antineutrinos in the NuMI neutrino beam
Search for the disappearance of muon antineutrinos in the NuMI neutrino beam
复制标题
DOI：
10.1103/physrevd.84.071103
复制
发表时间：
2011-08
影响因子：
5
通讯作者：
P. Adamson;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. Blake;G. Bock;D. Boehnlein
中科院分区：
文献类型：
--
作者：
P. Adamson;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. Blake;G. Bock;D. Boehnlein
我们报告了对 μ 子反中微子振荡参数的限制，这些参数是通过使用两个 MINOS 探测器测量 NuMI 中微子束的 7% 反中微子成分而获得的。在远探测器中，我们在带电电流 μ 子反中微子样本中选择了 130 个事件，与假设 |dm2bar|=2.32x10^-3 eV^2、snthetabar=1.0 下的预测 136.4 +/- 11.7(stat) ^{+10.2}_{-8.9}(syst) 事件相比。两种风味振荡近似的拟合将 |dm2bar|<3.37x10^-3 eV^2 限制在 90% 置信水平（snthetabar=1.0）。
We report constraints on muon antineutrino oscillation parameters that were obtained by using the two MINOS detectors to measure the 7% antineutrino component of the NuMI neutrino beam. In the Far Detector, we select 130 events in the charged-current muon antineutrino sample, compared to a prediction of 136.4 +/- 11.7(stat) ^{+10.2}_{-8.9}(syst) events under the assumption |dm2bar|=2.32x10^-3 eV^2, snthetabar=1.0. A fit to the two-flavor oscillation approximation constrains |dm2bar|<3.37x10^-3 eV^2 at the 90% confidence level with snthetabar=1.0.