Development of the detection of the neutrino magnetic moment using transitoin radiation

在一个带有右处理中性单体（nu_R）的标准模型中，中性的磁时刻被估计成很小：mu_<nu>=（3*10^&lt;-19&gt; m_<nu>）mu_B，其中m_<nu>是eV单元和mu_B是电子波尔磁体的中性质单元。因此，在10^&lt;-10&gt;的顺序下，存在一个中性磁性时刻，mu_B需要对电弱相互作用的标准模型进行修改。在神经磁性时刻的现有实验上绑定仍然很弱： mu（nu_e）&lt;10 ^&lt;-9&gt; mu_B， mu（nu_<mu>）&lt;10 ^&lt;-9&gt; mu_B和mu（nu_r）&lt;10^&lt;-6&gt; mu_B在90%CL上进行了实验搜索，使用中性电子弹性散射过程和e^+e^-*gammanunu^-过程。我们最近提出了一种新的方法，用过渡辐射来衡量中微子磁时刻。过渡辐射是一种很好的稳定的电磁现象。它也应该在磁性时刻交叉的时候生产中微子 ... More 两个不同的媒体之间的接口。辐射的可能性约为10^&lt;-12&gt; （mu_<nu>/mu_B）^2每个界面，辐射的能量谱与gammaomega_1一致，而gamma是中微子的洛伦兹因子（gamma= E_<nu>/m_<nu>），而omega_1是中等等离子体频率。它注意到，能量强度对神经质质量的依赖显然是在神经质质量上产生的，而能量的产生则是相对于神经质质量的事件。experiment uses the reactor neutrinos with flux of F_<nu>=10^<13>nu^^-_e/cm^2/sec。We propose a detector consisting of a radiator with N Mylar films （area= 100 m ^2，N-5 x10 ^3，omega_1 = 20 eV and thickness l_1= 0.1 mm） stretched in air （omega_2 = 0.8 eV and spacing l_2= 1 mm）。所生产的伽马射线是由100套闪烁的条纹探测到的。能量和伽马射线的方向是通过使用多分量散射事件进行重建的。探测效率估计为48%，而能量和角度分辨率估计为14%和2.5度。实验可以到达mu_<nu>-5·10^&lt;-9&gt; mu_B在一年后的数据。Less（低）

In the standard model with the right-handed neutrino singlet (nu_R) the magnetic moment of the neutrino is estimated to be negligibly small : mu_<nu>=(3*10^<-19>m_<nu>)mu_B, where m_<nu> is the neutrino mass in units of eV and mu_B is the electron Bohr magneton. Thus, the existence of a neutrino magnetic moment at an order of 10^<-10> mu_B would require a modification of the standard model of the electro-weak interaction. The existing experimental upper bounds on the neutrino magnetic moment are still weak : mu(nu_e)<10^<-9>mu_B, mu(nu_<mu>)<10^<-9>mu_B, and mu(nu_r)<10^<-6>mu_B at the 90% CL.These experimental searches have been performed using the process of neutrino-electron elastic scattering and the e^+e^-*gammanunu^^- process. One of us recently proposed a new method to measure the neutrino magnetic moment using the transition radiation. Transition radiation is a well established electromagnetic phenomenon. It should also be produced when the neutrino with a magnetic moment cross … More es the interface between two different media. The probability of the radiation is about 10^<-12> (mu_<nu>/mu_B)^2 per interface and the energy spectrum of the radiation is uniform up to gammaomega_1, where gamma is the Lorentz factor of the neutrino (gamma=E_<nu>/m_<nu>) and omega_1 is the plasma frequency of the medium. It is noted that the energy intensity depends explicitly on the neutrino mass and that the energy emitted is as large as the incident neutrino energy depending on the neutrino mass. The experiment uses the reactor neutrinos with flux of F_<nu>=10^<13>nu^^-_e/cm^2/sec. We propose a detector consisting of a radiator with N Mylar films (area=100m^2, N-5x10^3, omega_1=20eV and thickness l_1=0.1mm) stretched in air (omega_2=0.8eV and spacing l_2=1mm). The produced gamma rays are detected by the 100 sets of scintillator strips. The energy and the direction of the gamma rays are reconstructed by using the multi-Comptom scattering events. The detection efficiency is estimated to be 48%, and the energy resolution and the angular resolution are estimated to be about 14% and 2.5 degrees. The experiment can reach mu_<nu> -5・10^<-9>mu_B after 1 year of data-taking. Less