论文标题
长基线中微子的违反等效原理和四个中微子振荡
The Violation of Equivalence Principle and Four Neutrino Oscillations for Long Baseline Neutrinos
论文作者
论文摘要
违反等效原则预测，不同风味夫妇的中微子对重力有所不同。这种情况除了中微子传播过程中通常的质量中微子振荡外，还可以引起重力引起的风味振荡。即使确实违反了等效原则，它们的措施也将非常小。我们探讨了在4型饮食中微子框架（3个活性 + 1无菌）中探测违反等效原理（VEP）的可能性，其中考虑了质量和重力引起的振荡。为此，我们已经明确计算了4味框架中的振荡概率，除了物质中，还包括重力味味的混合。然后，通过对将这种4味的混合矩阵对角线化获得能量特征值。然后，使用形式主义来估计中微子工厂生产的中微子的远处中微子的错误和正确的标志产量，并穿过地球物质。当考虑了通常的三个主动中微子时，将这些结果与类似的估计进行了比较。
Violation of equivalence principle predicts that neutrinos of different flavor couple differently with gravity. Such a scenario can give rise to gravity induced flavor oscillations in addition to the usual mass flavor neutrino oscillations during the neutrino propagation. Even if the equivalence principle is indeed violated, their measure will be extremely small. We explore the possibility to probe the violation of equivalence principle (VEP) for the case of long baseline (LBL) neutrinos in a 4-flavor neutrino framework (3 active + 1 sterile) where both mass and gravity induced oscillations are considered. To this end, we have explicitly calculated the oscillation probability in 4-flavor framework that includes in addition to the mass-flavor mixing in matter, the gravity-flavor mixing also. The energy eigenvalues are then obtained by diagonalizing such a 4-flavor mixing matrix. The formalism is then employed to estimate the wrong and right sign muon yields at a far detector for neutrinos produced in a neutrino factory and travel through the Earth matter. These results are compared with the similar estimations when the usual three active neutrinos are considered.
