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

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arxiv 1902.08148 v2 pith:SJFWQ4TI submitted 2019-02-21 hep-ph hep-latnucl-th

S. Zafeiropoulos , Ph. Boucaud , F. De Soto , J. Rodríguez-Quintero , J. Segovia This is my paper · ORCID
classification hep-phhep-latnucl-th
keywords couplingphysicalstrongdomainlatticerunningwallagreement
verification ladder T0 review T1 audit T2 compute T3 formal
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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 $\alpha_{\overline{\rm MS}}(m_Z^2)=0.1172(11)$, 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.

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Cited by 3 Pith papers

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