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Power scaling rules for charmonia production and HQEFT

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	Sanchis Lozano, Miguel Ángel
	This document is a artículoDate2001
	Este documento está disponible también en : http://hdl.handle.net/10550/43919
	We discuss the power scaling rules along the lines of a complete Heavy Quark Effective Field Theory (HQEFT) for the description of heavy quarkonium production through a color-octet mechanism. To this end, we firstly derive a tree-level heavy quark effective Lagrangian keeping both particle-antiparticle mixed sectors allowing for heavy quark-antiquark pair annihilation and creation, but describing only low-energy modes around the heavy quark mass. Then we show the consistency of using HQEFT fields in constructing four-fermion local operators a la NRQCD, to be identified with standard color-octet matrix elements. We analyze some numerical values extracted from charmonia production by different authors and their hierarchy in the light of HQEFT.
	Sanchis Lozano, Miguel Ángel 2001 Power scaling rules for charmonia production and HQEFT International Journal of Modern Physics A 16 25 4189 4206
	http://dx.doi.org/10.1142/S0217751X01004852