INVESTIGADORES
DE FLORIAN daniel Enrique
artículos
Título:
Perturbative Generation of a Strange Quark Asymmetry in the Nucleon
Autor/es:
DANIEL DE FLORIAN; STEFANO CATANI; GERMAN RODRIGO; WERNER VOGELSANG
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Año: 2004 vol. 95 p. 1 - 1
ISSN:
0031-9007
Resumen:
We point out that perturbat ive evolut ion in QCD at three loops generates a strange-antistrange asymmetrys in the nucleon sea just from the fact that the nucleon has nonvanishing up and down quark valence densities. The recently computed three- loop splitting functions allow for an estimate of this effect. We find that a fairly sizable asymmetry may be generated. Results for analogous asymmetries in the heavy-quark sector are also presented.