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arXiv 0910.3167hep-ph
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真空稳定性、微扰性和标量单线态暗物质

Vacuum Stability, Perturbativity, and Scalar Singlet Dark Matter

Matthew Gonderinger, Yingchuan Li, Hiren Patel, Michael J. Ramsey-Musolf

摘要:

我们分析了单圈真空稳定性和微扰边界上的标准模型(SM)标量扇区包含标量暗物质候选人的单重扩展。我们表明,存在的单重-双重四次相互作用放松的SM希格斯质量的真空稳定性下限作为一个功能的截止和降低相应的上限的基础上微扰的考虑。我们还发现,真空稳定性的要求可能会对单重态暗物质质量的下限为给定的单重态四次自耦合,导致与所观察到的遗物密度一致的参数空间的限制。我们认为,发现一个轻的单重标量暗物质粒子可以提供间接的单重四次自耦合的信息。

英文摘要:

We analyze the one-loop vacuum stability and perturbativity bounds on a singlet extension of the Standard Model (SM) scalar sector containing a scalar dark matter candidate. We show that the presence of the singlet-doublet quartic interaction relaxes the vacuum stability lower bound on the SM Higgs mass as a function of the cutoff and lowers the corresponding upper bound based on perturbativity considerations. We also find that vacuum stability requirements may place a lower bound on the singlet dark matter mass for given singlet quartic self coupling, leading to restrictions on the parameter space consistent with the observed relic density. We argue that discovery of a light singlet scalar dark matter particle could provide indirect information on the singlet quartic self-coupling.

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