| Texto completo | |
| Autor(es): |
Shyam, R.
;
Tsushima, K.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 94, n. 7, p. 11-pg., 2016-10-27. |
| Resumo | |
We study the (D) over barD ((D) over bar D-0(0) and D+D-) charm meson pair production in antiproton ((p) over bar) induced reactions on nuclei at beam energies ranging from threshold to several GeV. Our model is based on an effective Lagrangian approach that has only the baryon-meson degrees of freedom and involves the physical hadron masses. The reaction proceeds via the t-channel exchanges of Lambda(vertical bar)(c), Sigma(vertical bar)(c), and Sigma(vertical bar)(c) (vertical bar) baryons in the initial collision of the antiproton with one of the protons of the target nucleus. The medium effects on the exchanged baryons are included by incorporating in the corresponding propagators, the effective charm baryon masses calculated within a quark-meson coupling (QMC) model. The wave functions of the bound proton have been determined within the QMC model as well as in a phenomenological model where they are obtained by solving the Dirac equation with appropriate scalar and vector potentials. The initial- and final-state distortion effects have been approximated by using an eikonal approximation-based procedure. Detailed numerical results are presented for total and double differential cross sections for the (D) over bar D-0(0) and D(-)D(+)production reactions on O-16 and Zr-90 targets. It is noted that at (p) over bar beam momenta of interest to the (P) over bar ANDA experiment, medium effects lead to noticeable enhancements in the charm meson production cross sections. (AU) | |
| Processo FAPESP: | 16/04191-3 - Produção de charm nas interações de antipróton com nucleons e núcleos |
| Beneficiário: | Kazuo Tsushima |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |
| Processo FAPESP: | 15/17234-0 - Propriedades de hádrons e núcleos em vácuo e médio à base de quarks e glúons |
| Beneficiário: | Kazuo Tsushima |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |