Artículos de revistas
Charmonium-pion cross section from QCD sum rules
Fecha
2002-03-14Registro en:
Physics Letters B. Amsterdam: Elsevier B.V., v. 529, n. 1-2, p. 87-92, 2002.
0370-2693
10.1016/S0370-2693(02)01248-0
WOS:000174591200013
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The J/psipi --> (D) over barD*, D (D) over bar*, (D) over bar *D* and (D) over barD cross sections as a function of roots are evaluated in a QCD sum rule calculation. We study the Borel sum rule for the four point function involving pseudoscalar and vector meson currents, up to dimension four in the operator product expansion. We find that our results are smaller than the J/psipi --> charmed mesons cross sections obtained with models based on meson exchange, but are close to those obtained with quark exchange models. (C) 2002 Elsevier B.V. B.V. All rights reserved.