The strong running coupling from the gauge sector of Domain Wall lattice QCD with physical quark masses

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 ${\alpha }_{\overline{\mathrm{MS}}}(m_Z^2)=0.1172(11)$, 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.

6 pages, 3 figures, v2: references added

References in corpus (14)

• Higgs boson gluon-fusion production in N3LO QCD
• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• Bridging a gap between continuum-QCD and ab initio predictions of hadron observables
• Non-perturbative comparison of QCD effective charges
• Indirect lattice evidence for the Refined Gribov-Zwanziger formalism and the gluon condensate $⟨A^2⟩$ in the Landau gauge
• High-precision quark masses and QCD coupling from $n_f=4$ lattice QCD
• Strong-Coupling Constant with Flavor Thresholds at Five Loops in the MS-bar Scheme
• The strong coupling from a nonperturbative determination of the $\Lambda$ parameter in three-flavor QCD
• On the reduction of hypercubic lattice artifacts
• The Realistic Lattice Determination of alpha_s(M_Z) Revisited
• Gauge-invariant gluon mass, infrared Abelian dominance and stability of magnetic vacuum
• Dimension-two gluon condensate from large-Nc Regge models
• Trace Anomaly, Thermal Power Corrections and Dimension Two condensates in the deconfined phase
• On non-primitively divergent vertices of Yang-Mills theory

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