4.7 Article

Superasymptotic and hyperasymptotic approximation to the operator product expansion

Journal

PHYSICAL REVIEW D
Volume 99, Issue 7, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.074019

Keywords

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Funding

  1. ministerio de Ciencia, Innovacion y Universidades [FPA2017-86989-P, SEV-2016-0588]
  2. Generalitat de Catalunya [2017SGR1069]
  3. Chileans FONDECYT Postdoctoral Grant [3170116]
  4. FONDECYT Regular Grant [1180344]

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Given an observable and its operator product expansion, we present expressions that carefully disentangle truncated sums of the perturbative series in powers of a from the nonperturbative (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/hyperasymptotic expansion. As a test we apply the methods to the static potential in the large beta(0) approximation. We see the superasymptotic and hyperasymptotic structure of the observable in full glory.

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