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Titolo:
Running coupling at low momenta, renormalization schemes, and renormalons
Autore:
Krasnikov, NV; Pivovarov, AA;
Indirizzi:
Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia Russian Acad Sci Moscow Russia 117312 st Nucl Res, Moscow 117312, Russia
Titolo Testata:
PHYSICS OF ATOMIC NUCLEI
fascicolo: 8, volume: 64, anno: 2001,
pagine: 1500 - 1507
SICI:
1063-7788(200108)64:8<1500:RCALMR>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPTIMIZED PERTURBATION-THEORY; TO-LEADING ORDER; HEAVY-QUARK; INFRARED RENORMALONS; ASYMPTOTIC STRUCTURE; SUM-RULES; QCD; SERIES; MODEL; OBSERVABLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
64
Recensione:
Indirizzi per estratti:
Indirizzo: Krasnikov, NV Russian Acad Sci, Inst Nucl Res, Shestidesyatiletiya Oktyabrya 7A, Moscow 117312, Russia Russian Acad Sci Shestidesyatiletiya Oktyabrya7A Moscow Russia 117312
Citazione:
N.V. Krasnikov e A.A. Pivovarov, "Running coupling at low momenta, renormalization schemes, and renormalons", PHYS ATOM N, 64(8), 2001, pp. 1500-1507

Abstract

We propose a method for summing a perturbation-theory asymptotic series that is related to infrared (IR) renormalons in QCD using special renormalization schemes in which the running coupling constant can be integrated over the small momenta. For our method to work, we should consider higher order perturbation-theory corrections to the standard bubble-chain diagrams. High-order corrections allow one to choose a scheme in which the coupling-constant evolution Carl be smoothly extrapolated to low momenta. In these schemes, the surd of all (extended) IR-renormalon asymptotic series is defined asall integral of the running coupling constant over the IR region. We present explicit examples of renormalization schemes of QCD that call be used tosure IR-renormalon asymptotic series according to our definition. (C) 2001MAIK "Nauka/Interperiodica".

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Documento generato il 08/04/20 alle ore 22:29:55