A QCD sum rule approach to the charmonium - pion cross section

Author(s)

M. Nielsen ^[1] ; F.S. Navarra ^[2] ; G. Krein ^[3] ; R.S. Marques de Carvalho ^[4]

Affiliation

^[1] Universidade de São Paulo. Instituto de Física - Brasil

^[2] Universidade de São Paulo. Instituto de Física - Brasil

^[3] Universidade Estadual Paulista. Instituto de Física Teórica - Brasil

^[4] Universidade Estadual Paulista. Instituto de Física Teórica - Brasil

• Document type: Journal article
• Source: Brazilian Journal of Physics; v. 33, n. 2, p. 316-319, 2003-06-00.

Abstract

We study the Borel sum rule for the tensor amplitude of the processes J/<FONT FACE=Symbol>y p ®</FONT> <IMG SRC="/img/revistas/bjp/v33n2/a30img01.gif" >D*,<IMG SRC="/img/revistas/bjp/v33n2/a30img01.gif"> D, <IMG SRC="/img/revistas/bjp/v33n2/a30img01.gif" >*D* and <IMG SRC="/img/revistas/bjp/v33n2/a30img01.gif" >D*. We also evaluate the cross sections as a function of <IMG SRC="/img/revistas/bjp/v33n2/a30img02.gif" >. We find that our results are smaller than the J/<FONT FACE=Symbol>y p ®</FONT> charmed mesons cross sections obtained with models based on meson exchange, but are close to those obtained with quark exchange models. (AU)

• FAPESP's process: 98/06590-2 - Hadrons' Physics
• Grantee: Manoel Roberto Robilotta
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 99/12987-5 - Relativistic heavy-ion collisions
• Grantee: Alejandro Szanto de Toledo
• Support Opportunities: Research Projects - Thematic Grants