Year: 2005
Type: article
Abstract: We study the properties of the ${\ensuremath{\Theta}}^{+}$ in nuclear matter and ${\ensuremath{\Theta}}^{+}$ hypernuclei within the quark mean-field model, which has been successfully used for the description of ordinary nuclei and \ensuremath{\Lambda} hypernuclei. With the assumption that the nonstrange mesons couple only to the u and d quarks inside baryons, a sizable attractive potential of the ${\ensuremath{\Theta}}^{+}$ in nuclear matter is achieved as a consequence of the cancellation between the attractive scalar potential and the repulsive vector potential. We investigate the ${\ensuremath{\Theta}}^{+}$ single-particle energies in light, medium, and heavy nuclei. More bound states are obtained in ${\ensuremath{\Theta}}^{+}$ hypernuclei in comparison with those in \ensuremath{\Lambda} hypernuclei.
Source: Physical Review C
Institutions: Nankai University, The University of Osaka
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1500519033