Nonresonant renormalization scheme for twist-$2$ operators in $\mathcal{N}=1$ SUSY SU($N$) Yang-Mills theory

Abstract

The short-distance asymptotics of the generating functional for $n$-point correlators of twist-$2$ operators in $\mathcal{N}=1$ supersymmetric (SUSY) SU($N$) Yang-Mills (SYM) theory were recently calculated in [1,2]. This calculation depends on a change of basis for renormalized twist-$2$ operators, in which $-\gamma(g)/ \beta(g)$ reduces to $\gamma_0/ (\beta_0\,g)$ at all orders in perturbation theory, where $\gamma_0$ is diagonal, $\gamma(g) = \gamma_0 g^2+\ldots$ is the anomalous-dimension matrix, and $\beta(g) = -\beta_0 g^3+\ldots$ is the beta function. The method is founded on a new geometric interpretation of operator mixing [3], assuming that the eigenvalues of the matrix $\gamma_0/ \beta_0$ meet the nonresonant condition $\lambda_i-\lambda_j\neq 2k$, with the eigenvalues $\lambda_i$ ordered nonincreasingly and $k\in \mathbb{N}^+$. This nonresonant condition was numerically verified for $i,j$ up to $10^4$ in [1,2]. In this work, we employ techniques initially developed in [4] to present a number-theoretic proof of the nonresonant condition for twist-$2$ operators, fundamentally based on the classic result that Harmonic numbers are not integers.