Non-perturbative renormalization by decoupling
| Autor: | Rainer Sommer, Alberto Ramos, Tomasz Korzec, Francesco Knechtli, Mattia Dalla Brida, Roman Höllwieser |
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| Přispěvatelé: | Dalla Brida, M, Hollwieser, R, Knechtli, F, Korzec, T, Ramos, A, Sommer, R |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
perturbation theory [quantum chromodynamics]
Quark Nuclear and High Energy Physics nonperturbative [renormalization] High Energy Physics::Lattice dependence [flavor] FOS: Physical sciences Lattice QCD Perturbation theory Computer Science::Digital Libraries 01 natural sciences decoupling Renormalization High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice strong coupling 0103 physical sciences heavy quark ddc:530 Gauge theory numerical calculations 010306 general physics Mathematical physics Quantum chromodynamics Physics Finite volume method 010308 nuclear & particles physics High Energy Physics - Lattice (hep-lat) Degenerate energy levels High Energy Physics::Phenomenology lattice field theory flavor: 3 [quark] QCD lcsh:QC1-999 FIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICI High Energy Physics - Phenomenology finite size gauge field theory Non-perturbative lcsh:Physics |
| Zdroj: | Physics Letters B, Vol 807, Iss, Pp 135571-(2020) Physics letters / B 807, 135571-(2020). doi:10.1016/j.physletb.2020.135571 Physics Letters Physics Letters B |
| DOI: | 10.1016/j.physletb.2020.135571 |
| Popis: | Physics letters / B 807, 135571 - (2020). doi:10.1016/j.physletb.2020.135571 We propose a new strategy for the determination of the QCD coupling. It relies on a coupling computed in QCD with $N_{\rm f} \geq 3$ degenerate heavy quarks at a low energy scale $\mu_{\rm dec}$, together with a non-perturbative determination of the ratio $\Lambda/\mu_{\rm dec}$ in the pure gauge theory. We explore this idea using a finite volume renormalization scheme for the case of $N_{\rm f} = 3$ QCD, demonstrating that a precise value of the strong coupling $\alpha_s$ 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. Published by North-Holland Publ., Amsterdam |
| Databáze: | OpenAIRE |
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