Boucaud, Ph.Le Yaouanc, AlainLeroy, J. P.Micheli, J.Pène, O.Soto Borrero, Feliciano Carlos deMoutarde, HervéRodríguez Quintero, José2015-05-052015-05-052003Boucaud, P., Le Yaouanc, A., Leroy, J. P., Micheli, J., Pène, O., Soto Borrero, F.C., Moutarde, H., Rodríguez Quintero, J.: "The strong coupling constant at small momentum as an instanton detector". Journal of High Energy Physics. Vol. 2003, n. 4, (2003). ISSN 1029-84791029-8479http://hdl.handle.net/10272/10496We 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Lattice Gauge Field TheoriesConfinementSolitons Monopoles and InstantonsLattice QCDjournal articledoi:10.1088/1126-6708/2003/04/005open access