Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-03-04
Phys.Rev. D48 (1993) 2337-2341
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages of plain Latex and 3 figures (available from the authors), preprint IPNO/TH 93-08
Scientific paper
10.1103/PhysRevD.48.2337
We study an extended Skyrme model which includes fourth and sixth-order terms. We explore some static properties like the $\Delta$-nucleon mass splitting and investigate the Skyrmion breathing mode in the framework of the linear response theory. We find that the monopole response function has a pronounced peak located at $\sim$ 400 MeV, which we identify to the Roper resonance $N(1440)$. As compared to the standard one, the extended Skyrme model provides a more accurate description of baryon properties.
Abada Abdellatif
Merabet Houari
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