分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-09-17
摘要: Three light sterile neutrinos (#23;se , #23;sμ and #23;s) are introduced to accommodate all the available neutrino data: the atmospheric neutrino anomaly is explained by #23;μ − #23;sμ oscillation with maximal mixing; the solar one is due to #23;e − #23;se oscillation of small angle Mikheyev-Smirnov-Wolfenstein type; the Liquid Scintillation Neutrino Detector data is from #23;e − #23;μ oscillations, so that the neutrinos can be the hot component of the dark matter. The big bang nucleosynthesis constraint is satisfied by taking the tau neutrino to be 10 MeV heavy. The #23;#28; decay is discussed in a model of gauge mediated supersymmetry breaking. The decay mode #23;#28; → ˜G with ˜G being the gravitino is proposed. The #23;#28; has a rather long lifetime ∼ 103 − 1013 sec. Its implication to the Gamma-ray Burst is discussed.