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

B. Blossier 1 Ph. Boucaud 1 M. Brinet 2 F. De Soto X. Du 2 Vincent Morenas 3 O. Pène K. Petrov J. Rodríguez-Quintero
1 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
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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IN2P3 | LPC-CLERMONT | LPSC | PRES_CLERMONT | UGA

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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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