First results on the running coupling in QCD with two massless flavours
We report on the non-perturbative computation of the running coupling of two-flavour QCD in the Schrödinger functional scheme. The corresponding Λ-parameter, which describes the coupling strength at high energy, is related to a low energy scale which still remains to be connected to a hadronic “exp...
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| Hauptverfasser: | , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 August 2001
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| In: |
Physics letters
Year: 2001, Jahrgang: 515, Heft: 1/2, Pages: 49-56 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/S0370-2693(01)00857-7 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/S0370-2693(01)00857-7 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269301008577 
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| Verfasserangaben: | Achim Bode, Roberto Frezzotti, Bernd Gehrmann, Martin Hasenbusch, Jochen Heitger, Karl Jansen, Stefan Kurth, Juri Rolf, Hubert Simma, Stefan Sint, Rainer Sommer, Peter Weisz, Hartmut Wittig, Ulli Wolff |
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| 520 | |a We report on the non-perturbative computation of the running coupling of two-flavour QCD in the Schrödinger functional scheme. The corresponding Λ-parameter, which describes the coupling strength at high energy, is related to a low energy scale which still remains to be connected to a hadronic “experimentally” observable quantity. We find the non-perturbative evolution of the coupling important to eliminate a significant contribution to the total error in the estimated Λ-parameter. | ||
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