Espinosa J R, Grojean C, Panico G, Pomarol A, Pujolàs O, Servant G
Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Campus UAB, E-08193 Bellaterra (Barcelona), Spain.
ICREA, Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, E-08010 Barcelona, Spain.
Phys Rev Lett. 2015 Dec 18;115(25):251803. doi: 10.1103/PhysRevLett.115.251803. Epub 2015 Dec 16.
Recently, a new mechanism to generate a naturally small electroweak scale has been proposed. It exploits the coupling of the Higgs boson to an axionlike field and a long era in the early Universe where the axion unchains a dynamical screening of the Higgs mass. We present a new realization of this idea with the new feature that it leaves no sign of new physics at the electroweak scale, and up to a rather large scale, 10^{9} GeV, except for two very light and weakly coupled axionlike states. One of the scalars can be a viable dark matter candidate. Such a cosmological Higgs-axion interplay could be tested with a number of experimental strategies.
最近，一种产生自然小电弱标度的新机制被提出来了。它利用了希格斯玻色子与类轴子场的耦合以及早期宇宙中一个漫长的时期，在这个时期轴子解除了对希格斯质量的动态屏蔽。我们给出了这个想法的一种新实现方式，其新特点是在电弱标度及高达相当大的标度(10^{9}) GeV 下，除了两个非常轻且耦合较弱的类轴子态外，没有新物理的迹象。其中一个标量可以是一个可行的暗物质候选者。这种宇宙学的希格斯 - 轴子相互作用可以通过多种实验策略来检验。
