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Strong running coupling at $\tau$ and $Z_0$ mass scales from lattice QCD

Abstract : This letter reports on the first computation, from data obtained in lattice QCD with $u,d,s$ and $c$ quarks in the sea, of the running strong coupling via the ghost-gluon coupling renormalized in the MOM Taylor scheme. We provide with estimates of $\alpha_{\bar{\rm MS}}(m_\tau^2)$ and $\alpha_{\bar{\rm MS}}(m_Z^2)$ (for which the inclusion of the dynamical charm quark makes the running much safer) in very good agreement with experimental results.
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http://hal.in2p3.fr/in2p3-00664197
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, January 30, 2012 - 9:14:30 AM
Last modification on : Wednesday, September 16, 2020 - 4:04:53 PM

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B. Blossier, Ph. Boucaud, M. Brinet, F. de Soto, X. Du, et al.. Strong running coupling at $\tau$ and $Z_0$ mass scales from lattice QCD. Physical Review Letters, American Physical Society, 2012, 108, pp.262002. ⟨10.1103/PhysRevLett.108.262002⟩. ⟨in2p3-00664197⟩

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