Modified instanton profile effects from lattice Green functions
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Boucaud, P.
Le Yaouanc, A.
Leroy, J. P.
Micheli, J.
Pène, O.
Rodríguez-Quintero, J.
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American Physical Society
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Abstract
We trace here instantons through the analysis of pure Yang-Mills gluon Green functions in the Landau gauge for a window of IR momenta (0.4<k<0.9¿¿GeV). We present lattice results that can be fitted only after substituting the Belavin-Polyakov-Shvarts-Tyupkin profile in the instanton-liquid model (ILM) by one based on the Diakonov and Petrov variational methods. This also leads us to gain information on the parameters of the ILM.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, 70 (11), art. no. 114503, pp. 114503-1-114503-16