Strong running coupling from the gauge sector of domain wall lattice QCD with physical quark masses

• Verfasst von: Zafeiropoulos, Savvas [VerfasserIn]
• Verfasst von: Boucaud, Ph. [VerfasserIn]
• Verfasst von: Soto, F. de [VerfasserIn]
• Verfasst von: Rodríguez-Quintero, J. [VerfasserIn]
• Verfasst von: Segovia, J. [VerfasserIn]
• Titel: Strong running coupling from the gauge sector of domain wall lattice QCD with physical quark masses
• Verf.angabe: S. Zafeiropoulos, Ph. Boucaud, F. De Soto, J. Rodríguez-Quintero, and J. Segovia
• E-Jahr: 2019
• Jahr: 26 April 2019
• Umfang: 6 S.
• Fussnoten: Gesehen am 24.03.2020
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2019
• Band/Heft Quelle: 122(2019,16) Artikel-Nummer 162002, 6 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.122.162002
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1693194821

Abstract

We report on the first computation of the strong running coupling at the physical point (physical pion mass) from the ghost-gluon vertex, computed from lattice simulations with three flavors of domain wall fermions. We find α¯¯¯¯¯¯MS(m2Z)=0.1172(11), in remarkably good agreement with the world-wide average. Our computational bridge to this value is the Taylor-scheme strong coupling, which has been revealed of great interest by itself because it can be directly related to the quark-gluon interaction kernel in continuum approaches to the QCD bound-state problem.