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
影响因子:
5
通讯作者:
Gupta R
中科院分区:
文献类型:
--
作者:
Gupta R
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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