Adler function for light quarks in analytic perturbation theory
Journal Article
·
· Physical Review D
The method of analytic perturbation theory, which avoids the problem of ghost-pole-type singularities and gives a self-consistent description of both spacelike and timelike regions, is applied to describe the {open_quotes}light{close_quotes} Adler function corresponding to the nonstrange vector channel of the inclusive decay of the {tau} lepton. The role of threshold effects is investigated. The behavior of the quark-antiquark system near threshold is described by using a new relativistic resummation factor. It is shown that the method proposed leads to good agreement with the {open_quotes}experimental{close_quotes} Adler function down to the lowest energy scale.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204475
- Journal Information:
- Physical Review D, Vol. 64, Issue 1; Other Information: DOI: 10.1103/PhysRevD.64.016005; Othernumber: PRVDAQ000064000001016005000001; 055113PRD; PBD: 1 Jul 2001; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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