论文标题
不民主的迪拉克·索索
Undemocratic Dirac seesaw
论文作者
论文摘要
标准模型的左手中微子和几个右撇子中微子可以通过相对较重的迪拉克费米斯的混合来获得微小的狄拉克质量基质。在这种狄拉克·索索场景中，涉及左手中微子的混合可以比涉及右手中微子的混合更大。这种不民主的参数选择对现象学具有吸引力。我们表明，重型迪拉克费米斯和右撇子中微子之间的小混合可能与宇宙中观察到的巴里昂不对称性具有共同的起源。我们还通过新的$ u（1）$ u（1）$量表对称对称的深色光子或baryon-minus-lepton编号将右撇子中微子的引入与暗物质的存在和稳定性联系起来。然后，我们指定如何将我们的情景嵌入到左右对称理论或宏伟的统一理论中。
The standard model left-handed neutrinos and several right-handed neutrinos can obtain a tiny Dirac mass matrix through their mixings with relatively heavy Dirac fermions. In this Dirac seesaw scenario, the mixings involving the left-handed neutrinos can be allowed much larger than those involving the right-handed neutrinos. This undemocratic parameter choice is attractive to phenomenology. We show that the small mixings between the heavy Dirac fermions and the right-handed neutrinos can have a common origin with the observed baryon asymmetry in the universe. We also connect the introduction of right-handed neutrinos to the existence and stability of dark matter by a new $U(1)$ gauge symmetry for dark photon or baryon-minus-lepton number. We then specify how to embed our scenario into a left-right symmetric theory or a grand unification theory.
