Ghost-gluon coupling, power corrections, and ^MS¯¯¯¯¯ from lattice QCD with a dynamical charm

Authors :: De Soto, Feliciano
Blossier, B.
Boucaud, P.
Brinet, M.
Du, X.
Gravina, M.
Morenas, V.
Pène, O.
Petrov, K.
Rodríguez-Quintero, J.
Source :: Physical Review D-Particles, Fields, Gravitation and Cosmology, 85 (3), art. no. 034503, RIO. Repositorio Institucional Olavide, instname
Publication Year :: 2012
Publisher :: American Physical Society, 2012.
Abstract: This paper is a first report on the determination of ^MS¯¯¯¯¯¯ from lattice simulations with 2+1+1 twisted-mass dynamical flavors via the computation of the ghost-gluon coupling renormalized in the MOM Taylor scheme. We show this approach allows a very good control of the lattice artefacts and confirm the picture from previous works with quenched and Nf=2 twisted-mass field configurations, which prove the necessity to include nonperturbative power corrections in the description of the running. We provide an estimate of ¿MS¯¯¯¯¯¯ in very good agreement with experimental results. To our knowledge, it is the first calculation with a dynamical charm quark which makes the running up to ¿s(MZ) much safer.<br />Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales<br />Versión del editor

Subjects :: Ghost-gluon coupling
High Energy Physics::Lattice
High Energy Physics::Phenomenology
Lattice

Language :: English
Database :: OpenAIRE
Journal :: Physical Review D-Particles, Fields, Gravitation and Cosmology, 85 (3), art. no. 034503, RIO. Repositorio Institucional Olavide, instname
Accession number :: edsair.dedup.wf.001..5cd973da33e4f29051a065b7d9f2cdf4

Tools