Mass shift of σ-meson in nuclear matter
The propagation of σ-meson in nuclear matter is studied in the Walecka model, by assuming that the sigma couples to a pair of nucleon–antinucleon states and to particle–hole states. The in-medium effect of σ–ω mixing is also studied. For completeness, the coupling of sigma to two virtual pions was a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Indian Academy of Sciences
2013
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| Subjects: | |
| Online Access: | http://eprints.uanl.mx/14901/1/541.pdf |
| _version_ | 1824414181011488768 |
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| author | Morones Ibarra, José Rubén Menchaca Maciel, Mónica del Carmen Santos Guevara, Ayax Robledo Padilla, Felipe Ángel |
| author_facet | Morones Ibarra, José Rubén Menchaca Maciel, Mónica del Carmen Santos Guevara, Ayax Robledo Padilla, Felipe Ángel |
| author_sort | Morones Ibarra, José Rubén |
| collection | Repositorio Institucional |
| description | The propagation of σ-meson in nuclear matter is studied in the Walecka model, by assuming that the sigma couples to a pair of nucleon–antinucleon states and to particle–hole states. The in-medium effect of σ–ω mixing is also studied. For completeness, the coupling of sigma to two virtual pions was also considered. It is found that the σ-meson mass decreases with respect to its value in vacuum and that the contribution of the σ–ω mixing effect on the mass shift is relatively small. |
| format | Article |
| id | eprints-14901 |
| institution | UANL |
| language | English |
| publishDate | 2013 |
| publisher | Indian Academy of Sciences |
| record_format | eprints |
| spelling | eprints-149012021-08-06T17:01:16Z http://eprints.uanl.mx/14901/ Mass shift of σ-meson in nuclear matter Morones Ibarra, José Rubén Menchaca Maciel, Mónica del Carmen Santos Guevara, Ayax Robledo Padilla, Felipe Ángel QC Física The propagation of σ-meson in nuclear matter is studied in the Walecka model, by assuming that the sigma couples to a pair of nucleon–antinucleon states and to particle–hole states. The in-medium effect of σ–ω mixing is also studied. For completeness, the coupling of sigma to two virtual pions was also considered. It is found that the σ-meson mass decreases with respect to its value in vacuum and that the contribution of the σ–ω mixing effect on the mass shift is relatively small. Indian Academy of Sciences 2013-03 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/14901/1/541.pdf http://eprints.uanl.mx/14901/1.haspreviewThumbnailVersion/541.pdf Morones Ibarra, José Rubén y Menchaca Maciel, Mónica del Carmen y Santos Guevara, Ayax y Robledo Padilla, Felipe Ángel (2013) Mass shift of σ-meson in nuclear matter. Pramana, 80 (3). pp. 479-485. ISSN 0304-4289 http://doi.org/10.1007/s12043-012-0503-2 doi:10.1007/s12043-012-0503-2 |
| spellingShingle | QC Física Morones Ibarra, José Rubén Menchaca Maciel, Mónica del Carmen Santos Guevara, Ayax Robledo Padilla, Felipe Ángel Mass shift of σ-meson in nuclear matter |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Mass shift of σ-meson in nuclear matter |
| title_full | Mass shift of σ-meson in nuclear matter |
| title_fullStr | Mass shift of σ-meson in nuclear matter |
| title_full_unstemmed | Mass shift of σ-meson in nuclear matter |
| title_short | Mass shift of σ-meson in nuclear matter |
| title_sort | mass shift of σ meson in nuclear matter |
| topic | QC Física |
| url | http://eprints.uanl.mx/14901/1/541.pdf |
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