English

Superasymptotic and hyperasymptotic approximation to the operator product expansion

High Energy Physics - Theory 2019-04-24 v2 High Energy Physics - Lattice High Energy Physics - Phenomenology Mathematical Physics math.MP

Abstract

Given an observable and its operator product expansion (OPE), we present expressions that carefully disentangle truncated sums of the perturbative series in powers of α\alpha from the non-perturbative (NP) corrections. This splitting is done with NP power accuracy. Analytic control of the splitting is achieved and the organization of the different terms is done along an super/hyper-asymptotic expansion. As a test we apply the methods to the static potential in the large β0\beta_0 approximation. We see the superasymptotic and hyperasymptotic structure of the observable in full glory.

Keywords

Cite

@article{arxiv.1902.07736,
  title  = {Superasymptotic and hyperasymptotic approximation to the operator product expansion},
  author = {Cesar Ayala and Xabier Lobregat and Antonio Pineda},
  journal= {arXiv preprint arXiv:1902.07736},
  year   = {2019}
}

Comments

60 pages, 11 figures, 2 Tables. Minor changes to meet journal version. Conclusions unchanged