Nelson-Barr relaxion
Nelson-Barr relaxion
复制标题
纳尔逊-巴尔松弛
作者：
O. Davidi;Rick S. Gupta;G. Perez;D. Redigolo;Aviv Shalit
在宇宙学弛豫模型中，弛豫被认定为QCD轴子，通常不能解释强粒子的小
Cosmological relaxation models in which the relaxion is identified with the QCD axion, generically fail to account for the smallness of the strong
C
P
phase. We present a simple alternative solution to this “relaxion
C
P
problem” based on the Nelson-Barr mechanism. We take
C
P
to be a symmetry of the UV theory, and the relaxion to have no anomalous coupling with QCD. The nonzero vacuum expectation value of the relaxion breaks
C
P
spontaneously, and the resulting phase is mapped to the Cabibbo-Kobayashi-Maskawa phase of the Standard Model. The extended Nelson-Barr quark sector generates the relaxion “rolling” potential radiatively, relating the new physics scale with the relaxion decay constant. With no new states within the reach of the LHC, our relaxion can still be probed in a variety of astrophysical and cosmological processes, as well as in flavor experiments.
DOI：
10.1140/epjc/s10052-014-2945-9
发表时间：
2014
期刊：
The European physical journal. C, Particles and fields
影响因子：
--
作者：
König M;Neubert M;Straub DM
通讯作者：
Straub DM