The strong coupling constant at small momentum as an instanton detector

We present a study of ¿MOM(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: de Soto, Feliciano, Boucaud, P., Le Yaouanc, A., Leroy, J. P., Micheli, J., Pène, O., Moutarde, H., Rodríguez-Quintero, J.
Format: article
Publication Date:2003
Country:España
Institution:Universidad Pablo de Olavide (UPO)
Repository:RIO. Repositorio Institucional Olavide
Language:English
OAI Identifier:oai:rio.upo.es:10433/1010
Online Access:http://hdl.handle.net/10433/1010
Access Level:Open access
Keyword:Lattice Gauge field theories
Confinement
Solitons monopoles and instantons
Lattice QCD
Description
Summary:We present a study of ¿MOM(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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