All-in-one relaxion: A unified solution to five particle-physics puzzles

All-in-one relaxion: A unified solution to five particle-physics puzzles
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一体化放松:五个粒子物理难题的统一解决方案

DOI:
10.1103/physrevd.100.055003
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
Gupta R
Gupta R
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Gupta R

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我们提出了粒子物理学中五个突出问题的统一松弛解:希格斯质量自然性、暗物质、物质-反物质不对称、中微子质量和强问题。在我们的构造中,关于标准弛豫模型的唯一附加场内容是一个上型向量费米子对和三个在弛豫位移对称下带电的右手中微子。观测到的暗物质丰度是由松弛场的振荡自动产生的,一旦它在重新加热后从原来的停止点错位,松弛场就会开始振荡。物质-反物质不对称是由再加热后弛豫的滚动破坏引起的自发重子生成引起的。这种违背通过一个算符传递给重子和轻子,算符由一个简单的中微子质量模型自然产生的右手中微子电流组成。最后,强问题通过Nelson-Barr机制来解决,即通过强加拉格朗日的对称性,该对称性仅由松弛自发地破坏。这种破缺是这样的,虽然产生了一个强的Cabibbo-Kobayashi-Maskawa (CKM)相,但诱导的强相要小得多,即在实验范围内。
We present a unified relaxion solution to the five major outstanding issues in particle physics: Higgs mass naturalness, dark matter, matter-antimatter asymmetry, neutrino masses and the strongproblem. The only additional field content in our construction with respect to standard relaxion models is an up-type vectorlike fermion pair and three right-handed neutrinos charged under the relaxion shift symmetry. The observed dark matter abundance is generated automatically by oscillations of the relaxion field that begin once it is misaligned from its original stopping point after reheating. The matter-antimatter asymmetry arises from spontaneous baryogenesis induced by theviolation due to the rolling of the relaxion after reheating. Theviolation is communicated to the baryons and leptons via an operator,, whereconsists of right-handed neutrino currents arising naturally from a simple neutrino mass model. Finally, the strongproblem is solved via the Nelson-Barr mechanism, i.e., by imposingas a symmetry of the Lagrangian that is broken only spontaneously by the relaxion. Thebreaking is such that although anstrong Cabibbo-Kobayashi-Maskawa (CKM) phase is generated, the induced strongphase is much smaller, i.e., within experimental bounds.
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