标题： 约束近简并的三味中微子 显示英文标题

标题： Constraining Almost Degenerate Three-Flavor Neutrinos

摘要： 我们讨论由太阳中微子异常和大气中微子异常、热暗物质以及无中微子双$\beta$衰变对几乎简并的三味中微子场景施加的约束。 发现在此模型的马约拉纳版本中，相对较大的$\theta_{13}$区域更受青睐，并得到了对CP破坏相位的约束。 显示英文摘要

摘要： We discuss constraints on a scenario of almost degenerate three-flavor neutrinos imposed by the solar and the atmospheric neutrino anomalies, hot dark matter, and neutrinoless double $\beta$ decays. It is found that in the Majorana version of the model the region with relatively large $\theta_{13}$ is favored and a constraint on the CP violating phases is obtained.