标题： 对尺度不变但非共形的超对称场论的评论 显示英文标题

标题： Comments on scale invariant but non-conformal supersymmetric field theories

摘要： 我们从微扰方法的角度研究了尺度不变但非共形的超对称场论的可能性。 生成β函数作为梯度流的单调递减a函数的显式存在，在两环阶次上对该可能性构成了强有力的障碍。 我们对文献中在(4-\epsilon )维中通过“方案改变”发现尺度不变但非共形的重整化群轨迹进行评论。 显示英文摘要

摘要： We investigate a possibility of scale invariant but non-conformal supersymmetric field theories from a perturbative approach. The explicit existence of monotonically decreasing a-function that generates beta-functions as a gradient flow provides a strong obstruction for such a possibility at two-loop order. We comment on the "discovery" of scale invariant but non-conformal renormalization group trajectories via a "change of scheme" in (4-\epsilon) dimension proposed in literatures.