摘要
The discovery of neutrino oscillation indicates that neutrinos have masses and each flavor state is actually a superposition of three mass states with masses m_1,m_2,and m_3.However,the neutrino oscillation experiments are not able to measure the absolute masses of neutrinos,but can only measure the squared mass differences between the neutrino mass eigenstates—The solar and reactor experiments gave Δm^2_(21)? 7.5×10^(-5), and the atmospheric and accelerator beam experiments gave|?m^2_(31)|?2.5×10^(-3),which indicates that there are two possible mass orders,i.e.,the normal hierarchy (NH) with m_1<m_2?m_3 and the inverted hierarchy(IH) with m_3 ? m_1 < m_2.
The discovery of neutrino oscillation indicates that neutrinos have masses and each flavor state is actually a superposition of three mass states with masses m1,m2,and m3.However,the neutrino oscillation experiments are not able to measure the absolute masses of neutrinos,but can only measure the squared mass differences between the neutrino mass eigenstates—The solar and reactor experiments gave
基金
supported by the National Natural Science Foundation of China (Grant Nos. 11522540, and 11690021)
the Top-Notch Young Talents Program of China, and the Provincial Department of Education of Liaoning (Grant No. L2012087)
