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Bali, Gunnar S. ; Schilling, Klaus

Running coupling and theΛparameter from SU(3) lattice simulations

Artikel

Bali, Gunnar S. und Schilling, Klaus (1993) Running coupling and theΛparameter from SU(3) lattice simulations. Physical Review D 47 (2), S. 661-672.

DOI zum Zitieren dieses Dokuments: 10.5283/epub.40017


Zusammenfassung

We present new results on the static q¯q potential from high-statistics simulations on 324 and smaller lattices, using the standard Wilson action at β=6.0, 6.4, and 6.8 on the Connection Machine CM-2. Within our statistical errors (≈ 1%) we do not observe any finite-size effects affecting the potential values, on varying the spatial lattice extent from 0.9 fm up to 3.3 fm. We are able to see and ...

We present new results on the static q¯q potential from high-statistics simulations on 324 and smaller lattices, using the standard Wilson action at β=6.0, 6.4, and 6.8 on the Connection Machine CM-2. Within our statistical errors (≈ 1%) we do not observe any finite-size effects affecting the potential values, on varying the spatial lattice extent from 0.9 fm up to 3.3 fm. We are able to see and quantify the running of the coupling from the Coulomb behavior of the interquark force. From this we extract the ratio √σΛL. We demonstrate that scaling violations on the string tension can be considerably reduced by introducing effective coupling schemes, which allow for a safe extrapolation of ΛL to its continuum value. Both methods yield consistent values for Λ:Λ–––––MS=0.555+0.019−0.017×√σ=244+8−7 MeV, where –––––MS denotes the modified minimal subtraction scheme. At the highest-energy scale attainable to us we find α(5 GeV)=0.150(3).



Beteiligte Einrichtungen


Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftPhysical Review D
VerlagAmerican Physical Society (APS)
Open Access ArtSHERPA/RoMEO
Band47
Nummer des Zeitschriftenheftes oder des Kapitels2
SeitenbereichS. 661-672
Datum1993
Veröffentlichungsdatum02 Apr 2019 11:34
InstitutionenPhysik > Institut für Theoretische Physik > Lehrstuhl Professor Schäfer > Arbeitsgruppe Gunnar Bali
Identifikationsnummer
WertTyp
10.1103/PhysRevD.47.661DOI
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenJa
URN der UB Regensburgurn:nbn:de:bvb:355-epub-400173
Dokumenten-ID40017

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