一些非标准宇宙学方案中的Sphaleron束缚
Sphaleron bound in some nonstandard cosmology scenarios
摘要：
在第一种情况下，我们修改了截止尺度的上限的六维势Higgs算子所需的成功的电弱重子生成的情况下，一个修改的膨胀历史所造成的非相互作用的标量场的存在时，相变发生。在一定的条件下，在传统的情况下，上限860 GeV的截止尺度可以提高到1 TeV的修改后的膨胀情况下。在第二种情况下，我们考虑Randall-Sundrum II型模型。结果表明，在该模型中，由小距离牛顿引力势的有效性所确定的五维普朗克尺度的下界，对于排除该模型满足sphaleron界是至关重要的;但是，在此情况下，再次通过包括非-在电弱尺度上相互作用的标量场则可以使该模型满足一定参数空间的sphaleron界。
英文摘要：
In the first scenario, we revise the upper bound of the cutoff scale of the dimension-six potential Higgs operator required for a successful electroweak baryogenesis in the case of a modified expansion history caused by the existence of a non-interacting scalar field at the time phase transition happens. The upper bound 860 GeV of the cutoff scale in the conventional case can be improved to 1 TeV in the modified expansion case under certain conditions. In the second scenario, we consider the Randall-Sundrum type II model. We show that the lower bound of the five-dimensional Planck scale in this model, which is determined from the validity of Newtonian gravitational potential at small distance, turns out to be crucial in eliminating this model as a viable candidate to satisfy the sphaleron bound; however, again modifying the expansion history by including a non-interacting scalar field at the electroweak scale can then make this model satisfy the sphaleron bound with a certain parameter space.
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