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arXiv 1901.08581hep-thhep-ph
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渐近自由解的概型依赖性

Scheme dependence of asymptotically free solutions

Holger Gies, René Sondenheimer, Alessandro Ugolotti, Luca Zambelli

摘要:

最近的研究为在高能极限下不具有渐近对称性的非阿贝尔粒子模型中存在新的渐近自由轨线提供了证据。我们将这些结果扩展到一个一般的${\rm SU}(N_{\rm L})\times {\rm SU}(N_{\rm c})$希格斯汤川模型,其中包括非阿贝尔部门的标准模型,找到进一步确认这样的情况下,为广泛的一类正则化,占阈值行为持续到最高能量。我们构造这些渐近自由的轨迹内传统的$\overline{\text{MS}}$计划和系统的弱耦合扩展。这些解决方案的存在被认为是一个计划独立的现象,证明了质量依赖计划的基础上一般动量空间红外正则化。方案的改变导致理论的耦合空间到自身的映射,这在本例中也转化为渐近自由解空间的重新参数化。

英文摘要:

Recent studies have provided evidence for the existence of new asymptotically free trajectories in non-Abelian particle models without asymptotic symmetry in the high-energy limit. We extend these results to a general ${\rm SU}(N_{\rm L})\times {\rm SU}(N_{\rm c})$ Higgs-Yukawa model that includes the non-Abelian sector of the standard model, finding further confirmation for such scenarios for a wide class of regularizations that account for threshold behavior persisting to highest energies. We construct these asymptotically free trajectories within conventional $\overline{\text{MS}}$ schemes and systematic weak coupling expansions. The existence of these solutions is argued to be a scheme-independent phenomenon, as demonstrated for mass-dependent schemes based on general momentum-space infrared regularizations. A change of scheme induces a map of the theory's coupling space onto itself, which in the present case also translates into a reparametrization of the space of asymptotically free solutions.

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