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 |
| Published: |
Indian Academy of Sciences
2013
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| Subjects: | |
| Online Access: | http://eprints.uanl.mx/14901/1/541.pdf |
| Summary: | 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. |
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