6533b7d7fe1ef96bd12685a4
RESEARCH PRODUCT
Comparison between two strictly local QCD sum rules
Hans J. VogelNa Papadopoulossubject
Quantum chromodynamicsPhysicsParticle physicsQCD sum rulesAnalytic continuationZero (complex analysis)ExtrapolationDuality (optimization)Sum rule in quantum mechanicsConnection (algebraic framework)Mathematical physicsdescription
Two strictly local QCD sum rules, analytic extrapolation by conformal mapping and analytic continuation by duality, are developed and presented in full detail. They allow the extrapolation of the QCD amplitude to a single point near zero in the complex {ital q}{sup 2} plane. Being orthogonal to the usual QCD sum rules, they present a drastic enlargement of phenomenological applications. In addition, the stability of both methods is shown explicitly, a fact which makes them particularly reliable. The difference between the two methods is illustrated in connection with the determination of the hadronic ({ital g}{minus}2) factor of the muon. Their effectiveness is demonstrated in the calculation of the topological susceptibility where both methods lead to {chi}{sub {ital t}}{sup 1/4}=171{plus minus}4 MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1989-12-01 | Physical Review D |