The strong coupling constant at small momentum as an instanton detector

We present a study of αMOM(p) at small p computed from the lattice in the quenched approximation (nf = 0). It shows a dramatic proptop4 law which can be understood within an instanton liquid model. In this framework the prefactor gives a direct measure of the instanton density in thermalised configu...

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Bibliographic Details
Authors: Boucaud, Ph., Le Yaouanc, Alain, Leroy, J. P., Micheli, J., Pène, O., Soto Borrero, Feliciano Carlos de, Moutarde, Hervé, Rodríguez Quintero, José
Format: article
Publication Date:2003
Country:España
Institution:Universidad de Huelva (UHU)
Repository:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Language:English
OAI Identifier:oai:ariasmontano.uhu.es:10272/10496
Online Access:http://hdl.handle.net/10272/10496
Access Level:Open access
Keyword:Lattice Gauge Field Theories
Confinement
Solitons Monopoles and Instantons
Lattice QCD
Description
Summary:We present a study of αMOM(p) at small p computed from the lattice in the quenched approximation (nf = 0). It shows a dramatic proptop4 law which can be understood within an instanton liquid model. In this framework the prefactor gives a direct measure of the instanton density in thermalised configurations. A preliminary result for this density is 5.27(4) fm−4.

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