论文标题
连贯的中微子核散射中的环效应
Loop effect in the coherent neutrino-nucleus scattering
论文作者
论文摘要
中微子与中微子之间的连接在一般中微子模型中描述了。在此模型中，中微子可以转化为新的费米，因此相互作用会导致中微子散射实验中的新型后坐力光谱。我们通过评估对相干弹性中微子核散射的树级和环级贡献来研究一般中微子相互作用。我们通过使用Dirac Fermion $χ$和Spin-0中微子的简化中微子模型的框架来说明散射。对于夸克扇区中的CP阶段为0和$π/2 $，检测过程分别由树级别和环路级别的贡献主导。我们通过拟合相干数据来研究调解人与新粒子$χ$或夸克之间耦合的约束。 $M_χ$比传入中微子的最大能量大的参数空间也可以通过包括循环级别的贡献来限制。
A connection between the neutrino and an exotic fermion is described in the general neutrino model. In this model the neutrinos can convert into the new fermion and thus the interaction leads to novel recoil spectrum in the neutrino scattering experiments. We study the general neutrino interaction by evaluating both the tree-level and loop-level contributions to the coherent elastic neutrino-nucleus scattering. We illustrate the scattering by taking the framework of a simplified neutrino model with a Dirac fermion $χ$ and a spin-0 mediator. For the CP phase in the quark sector being 0 and $π/2$, the detection processes are dominated by the tree-level and loop-level contribution, respectively. We investigate the constraints on the couplings between the mediator and the new particle $χ$ or the quarks by fitting to the COHERENT data. The parameter space with $m_χ$ larger than the maximal energy of incoming neutrinos can be also constrained by including the loop-level contribution.
