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.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2012, 108, pp.262002. <10.1103/PhysRevLett.108.262002>


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Soumis le : lundi 30 janvier 2012 - 09:14:30
Dernière modification le : mercredi 27 juillet 2016 - 14:48:48

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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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