Göckeler, M.; Horsley, R.; Irving, A.C.; Pleiter, D.; Rakow, P.E.L.; Schierholz, G. and Stüben, H. (2006) A determination of the Lambda parameter from full lattice QCD. Physical Review D, 73 . Article Number: 014513. ISSN 1550-2368 (online); 1550-7998 (print)
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Official URL: http://link.aps.org/abstract/PRD/v73/e014513
Abstract
We present a determination of the QCD parameter Lambda in the quenched approximation (n_f=0) and for two flavours (n_f=2) of light dynamical quarks. The calculations are performed on the lattice using O(a) improved Wilson fermions and include taking the continuum limit. We find Lambda_{n_f=0} = 259(1)(20) MeV and Lambda_{n_f=2} = 261(17)(26) MeV}, using r_0 = 0.467 fm to set the scale. Extrapolating our results to five flavours, we obtain for the running coupling constant at the mass of the Z boson alpha_s(m_Z) = 0.112(1)(2). All numbers refer to the MSbar scheme.
| Item Type: | Article |
|---|---|
| Additional Information: | LTH 647; arXiv Number: arXiv:hep-ph/0502212v2. Additional citation information: PHYSICAL REVIEW D 73, 014513 (2006); 1550-7998/2006/73(1)/014513(13). 13 pages. Published 23 January 2006. Issue: January 2006. |
| Uncontrolled Keywords: | STRONG-COUPLING CONSTANT; WILSON FERMIONS; BETA-FUNCTION; QUANTUM CHROMODYNAMICS; GAUGE-THEORIES; QUARK MASSES; ALPHA(S); IMPROVEMENT; RENORMALIZATION; COMPUTATION |
| Subjects: | Q Science > QC Physics |
| Departments, Research Centres and Related Units: | Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences |
| DOI: | 10.1103/PhysRevD.73.014513 |
| Related URLs: | |
| Refereed: | Yes |
| Status: | Published |
| ID Code: | 423 |
| Deposited On: | 31 Oct 2008 09:57 |
| Last Modified: | 05 Mar 2012 10:36 |
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