| Texto completo | |
| Autor(es): |
Hutauruk, Parada T. P.
;
Cobos-Martinez, J. J.
;
Oh, Yongseok
;
Tsushima, K.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 100, n. 9, p. 13-pg., 2019-11-13. |
| Resumo | |
In-medium valence-quark distributions of pi(+) and K+ mesons in symmetric nuclear matter are studied by combining the Nambu-Jona-Lasinio model and the quark-meson coupling model. The in-medium properties of the current quarks, which are used as inputs for studying the in-medium pion and kaon properties in the Nambu-Jona-Lasinio model, are calculated within the quark-meson coupling model. The light-quark condensates, light-quark dynamical masses, pion and kaon decay constants, and pion- and kaon-quark coupling constants are found to decrease as nuclear density increases. The obtained valence quark distributions in vacuum for both the pi(+) and K+ could reasonably describe the available experimental data over a wide range of Bjorken-x. The in-medium valence u-quark distribution in the pi(+) at Q(2) = 16 GeV2 is found to be almost unchanged compared to the in-vacuum case. However, the in-medium to in-vacuum ratios of both the valence u-quark and valence s-quark distributions of the K+ meson at Q(2) = 16 GeV2 increase with nuclear matter density but show different x-dependence. Namely, the ratio for the valence u-quark distribution increases with x, while that for the valence s quark decreases with x. These features are enhanced at higher density regions. (AU) | |
| Processo FAPESP: | 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos |
| Beneficiário: | Brett Vern Carlson |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |