Superasymptotic and hyperasymptotic approximation to the operator product expansion

被引:24
|
作者
Ayala, Cesar [1 ]
Lobregat, Xabier [2 ,3 ]
Pineda, Antonio [2 ,3 ]
机构
[1] UTFSM, Dept Phys, Casilla 110-V, Valparaiso, Chile
[2] Univ Autonoma Barcelona, Dept Fis, Grp Fis Teor, E-08193 Bellaterra, Barcelona, Spain
[3] Univ Autonoma Barcelona, IFAE, BIST, E-08193 Bellaterra, Barcelona, Spain
关键词
PERTURBATION-THEORY; HEAVY-QUARK; POLE MASS; QCD; RENORMALIZATION; RENORMALONS; LATTICE; AMBIGUITIES; LIMIT;
D O I
10.1103/PhysRevD.99.074019
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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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页数:27
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