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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Article dans une revue
Physical Review Letters, American Physical Society, 2012, 108, pp.262002. 〈10.1103/PhysRevLett.108.262002〉
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http://hal.in2p3.fr/in2p3-00664197
Contributeur : Emmanuelle Vernay <>
Soumis le : lundi 30 janvier 2012 - 09:14:30
Dernière modification le : jeudi 9 février 2017 - 16:06:44

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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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