Problems with Hadronic <math>ηc</math> Decays and the Perturbative <math>QCD</math> Scheme for Exclusive Reactions

Nota de FísicaPublicado

Problems with Hadronic $<math>\eta_c</math>$ Decays and the Perturbative $<math>QCD</math>$ Scheme for Exclusive Reactions

M. Anselmino; F. Caruso; F. Murgia

1990

Autores: M. Anselmino; F. Caruso; F. Murgia
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1990
Descrição: We consider some observed decays of the ?c which should be forbidden in the perturbative <math>QCD\,\!</math> description of exclusive reactions: <math> \eta_c \rightarrow \rho \rho, K^{*} \bar{K}^{*}, \phi \phi </math>. It is shown explicitely that quark mass corrections do not help and still give a zero result. Also the experimental value for the decay rate <math>\Gamma (\eta_c \rightarrow p \bar{p})</math> is argued to be anomalously large. Implications for the perturbative <math>QCD\,\!</math> scheme are discussed and some other possible explanations of the data are suggested.
Ano: 1990
Número: CBPF-NF-023/90
Vínculo com tese: Não
Vínculo com bolsa: Não