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

Autor(es)

M. Nielsen ; F.S. Navarra ; G. Krein ; R.S. Marques de Carvalho

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Physics; v. 33, n. 2, p. 316-319, Jun. 2003.

Resumo

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)

• Processo FAPESP: 98/06590-2 - Física de hádrons
• Beneficiário: Manoel Roberto Robilotta
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 99/12987-5 - Física nuclear com íons-pesados relativísticos
• Beneficiário: Alejandro Szanto de Toledo
• Linha de fomento: Auxílio à Pesquisa - Temático