论文标题
一环II型Seesaw Neutrino模型具有稳定的暗物质候选者
One-loop Type II Seesaw Neutrino Model with Stable Dark Matter Candidates
论文作者
论文摘要
使用标量三重态，两个标量双线和一个费米子以1环的级别打开Weinberg操作员，从而引起T4-2-I单循环拓扑。该拓扑产生的中微质量总是伴随着树级II型Seesaw贡献。在这项工作中，我们根据此拓扑提出了一个辐射性主要中微子质量模型，以避免树级II级SEESAW机制，我们通过$ {g} _ {f} = \ Mathbb {d} _ {d} _ {4} \ times z________________________________2循环到三个右撇子中微子。在这种情况下，$ {g} _ {f} $ group也阻止了这些右中微子的树级狄拉克中微子质量。此外，为了使T4-2-i拓扑充分发挥作用，标量扇区由两个Flavon字段扩展到$ {g} _ {f} $对称性破坏后，该模型成功地说明了观察到的中微子肿块和混合，并允许存在稳定的暗物质（DM）候选人。实际上，循环中运行的所有粒子都是潜在的暗物质候选者，因为不间断的离散组$ z_ {2} \ in {g} _ {f} $保证了它们的稳定性。
Opening up the Weinberg operator at 1-loop level using a scalar triplet, two scalar doublets and one fermion gives rise to T4-2-i one-loop topology. Neutrino masses generated from this topology are always accompanied by the tree level Type II seesaw contribution. In this work, we propose a radiative Majorana neutrino mass model based on this topology where to avoid the tree level Type II seesaw mechanism, we extend the model by a ${G}_{f}=\mathbb{D}_{4}\times Z_{3}\times Z_{5}\times Z_{2}$ flavor symmetry and we promote the fermion inside the loop to three right-handed neutrinos. In this scenario, the tree level Dirac neutrino masses resulted from these right-handed neutrinos is also prevented by the ${G}_{f}$ group. Moreover, in order for T4-2-i topology to fully function, the scalar sector is extended by two flavon fields where after ${G}_{f}$ symmetry breaking, the model accounts successfully for the observed neutrino masses and mixing as well as allows for the existence of stable dark matter (DM) candidates. Indeed, all the particles running in the loop are potential dark matter candidates as their stability is guaranteed by the unbroken discrete group $Z_{2}\in {G}_{f}$.
