质量依赖的β函数
A mass-dependent beta-function
摘要：
基于背景场动量扣除方案，考虑了与费米子质量有关的全阶β函数的阈值效应。在远离所有阈值的情况下，建议的β函数简化为简化的全阶形式，其灵感来自于具有固定整数个费米子味的N=1超对称规范理论的Novikov-Shifman-Vainshtein-Zakharov β函数。在（形式上）无限质量的相应纯杨-米尔斯β函数恢复。我们讨论了非阿贝尔场论在相图中的应用。
英文摘要：
Threshold effects related to fermion masses are considered for an all-order beta-function based on a background field momentum subtraction scheme. Far away from all thresholds, the suggested beta-function reduces to the conjectured all-order form inspired by the Novikov-Shifman-Vainshtein-Zakharov beta-function of N=1 supersymmetric gauge theories with a fixed integer number of fermion flavours. At (formally) infinite masses the corresponding pure Yang--Mills beta-function is recovered. We discuss applications to the phase diagram of non-Abelian field theories.
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