Publication: The strong coupling constant at small momentum as an instanton detector
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Boucaud, P.
Le Yaouanc, A.
Leroy, J. P.
Micheli, J.
Pène, O.
Moutarde, H.
Rodríguez-Quintero, J.
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IOP Publishing
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Abstract
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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Journal of High Energy Physics, 7 (4), pp. 65-74