Future Physics in Borexino - Towards the Detection of CNO Neutrinos and the Search for Sterile Neutrinos

Borexino实验是第一次也是唯一一次成功地确定了pp周期太阳中微子光谱中所有主要成分的通量。然而，对于来自CNO循环的中微子，到目前为止只能确定一个上限。该项目的主要目标是改进背景排除方法，以使确定CNO中微子通量成为可能。在此背景下，我们还计划开发新的液体闪烁体带电粒子跟踪方法。随着对CNO中微子通量的测量，所有太阳中微子将首次在逐个事件的单一实验中被观测到，这将是太阳中微子实验物理的一个里程碑。该项目的另一个部分是在Borexino使用高强度中微子源。主要目标是在短基线上寻找不育中微子振荡。此外，这样的中微子源提供了研究中微子的基本特征的机会，例如可能的磁矩。

The Borexino experiment is the first and only experiment that has successfully determined the flux of all the major components of the solar neutrino spectrum from the pp-cycle. However, for neutrinos originating from the CNO-cycle only an upper limit could be established so far. The primary goal of this project is the improvement of methods for the background rejection in order to make a determination of the CNO neutrino flux possible. In this context, we also plan to develop new methods of charged particle tracking in liquid scintillitator. With the measurement of the CNO neutrino flux, all solar neutrinos will be observed in a single experiment on an event by event basis for the first time, which will represent a milestone in experimental solar neutrino physics.Another part of the project is the use of a high intensity neutrino source at Borexino. The primary goal is the search for sterile neutrino oscillation on short baselines. Furthermore such a neutrinos source offers the opportunity to study fundamental characteristics of neutrinos such as a possible magnetic moment.