Service de Physique Théorique, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium.
Phys Rev Lett. 2013 May 24;110(21):211802. doi: 10.1103/PhysRevLett.110.211802. Epub 2013 May 22.
A minimal extension of the standard model to naturally generate small neutrino masses and provide a dark matter candidate is proposed. The dark matter particle is part of a new scalar doublet field that plays a crucial role in radiatively generating neutrino masses. The symmetry that stabilizes the dark matter also suppresses neutrino masses to appear first at three-loop level. Without the need of right-handed neutrinos or other very heavy new fields, this offers an attractive explanation of the hierarchy between the electroweak and neutrino mass scales. The model has distinct verifiable predictions for the neutrino masses, flavor mixing angles, colliders, and dark matter signals.
提出了一种标准模型的微小扩展，以自然产生小的中微子质量并提供暗物质候选体。暗物质粒子是新的标量二重态场的一部分，该场在辐射产生中微子质量方面起着至关重要的作用。稳定暗物质的对称性也将中微子质量抑制到仅在三圈水平上出现。不需要右手中微子或其他非常重的新场，这为电弱和中微子质量尺度之间的层次结构提供了一个有吸引力的解释。该模型对中微子质量、味道混合角、对撞机和暗物质信号具有明确的可验证预测。
