Non-perturbative renormalization by decoupling
We propose a new strategy for the determination of the QCD coupling. It relies on a coupling computed in QCD with Nf≥3 degenerate heavy quarks at a low energy scale μdec, together with a non-perturbative determination of the ratio Λ/μdec in the pure gauge theory. We explore this idea using a finite...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-08-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320303750 |
| _version_ | 1818623337934356480 |
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| author | Mattia Dalla Brida Roman Höllwieser Francesco Knechtli Tomasz Korzec Alberto Ramos Rainer Sommer |
| author_facet | Mattia Dalla Brida Roman Höllwieser Francesco Knechtli Tomasz Korzec Alberto Ramos Rainer Sommer |
| author_sort | Mattia Dalla Brida |
| collection | DOAJ |
| description | We propose a new strategy for the determination of the QCD coupling. It relies on a coupling computed in QCD with Nf≥3 degenerate heavy quarks at a low energy scale μdec, together with a non-perturbative determination of the ratio Λ/μdec in the pure gauge theory. We explore this idea using a finite volume renormalization scheme for the case of Nf=3 QCD, demonstrating that a precise value of the strong coupling αs can be obtained. The idea is quite general and can be applied to solve other renormalization problems, using finite or infinite volume intermediate renormalization schemes. |
| first_indexed | 2024-12-16T18:39:28Z |
| format | Article |
| id | doaj.art-0194c2f8cb154cf0824830f656a21f22 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-16T18:39:28Z |
| publishDate | 2020-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-0194c2f8cb154cf0824830f656a21f222022-12-21T22:21:06ZengElsevierPhysics Letters B0370-26932020-08-01807135571Non-perturbative renormalization by decouplingMattia Dalla Brida0Roman Höllwieser1Francesco Knechtli2Tomasz Korzec3Alberto Ramos4Rainer Sommer5Dipartimento di Fisica, Università di Milano-Bicocca and INFN, Sezione di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, ItalyDepartment of Physics, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, GermanyDepartment of Physics, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, GermanyDepartment of Physics, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, GermanySchool of Mathematics and Hamilton Mathematics Institute, Trinity College Dublin, Dublin 2, IrelandJohn von Neumann Institute for Computing (NIC), DESY, Platanenallee 6, 15738 Zeuthen, Germany; Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany; Corresponding author.We propose a new strategy for the determination of the QCD coupling. It relies on a coupling computed in QCD with Nf≥3 degenerate heavy quarks at a low energy scale μdec, together with a non-perturbative determination of the ratio Λ/μdec in the pure gauge theory. We explore this idea using a finite volume renormalization scheme for the case of Nf=3 QCD, demonstrating that a precise value of the strong coupling αs can be obtained. The idea is quite general and can be applied to solve other renormalization problems, using finite or infinite volume intermediate renormalization schemes.http://www.sciencedirect.com/science/article/pii/S0370269320303750QCDPerturbation theoryLattice QCD |
| spellingShingle | Mattia Dalla Brida Roman Höllwieser Francesco Knechtli Tomasz Korzec Alberto Ramos Rainer Sommer Non-perturbative renormalization by decoupling Physics Letters B QCD Perturbation theory Lattice QCD |
| title | Non-perturbative renormalization by decoupling |
| title_full | Non-perturbative renormalization by decoupling |
| title_fullStr | Non-perturbative renormalization by decoupling |
| title_full_unstemmed | Non-perturbative renormalization by decoupling |
| title_short | Non-perturbative renormalization by decoupling |
| title_sort | non perturbative renormalization by decoupling |
| topic | QCD Perturbation theory Lattice QCD |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320303750 |
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