Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-01-23
Phys.Lett. B473 (2000) 200-208
Physics
Nuclear Physics
Nuclear Theory
14 pages, REVTeX, 3 figures (Ps), 83 kb
Scientific paper
10.1016/S0370-2693(99)01495-1
We investigate an extended chiral soliton model which includes $\pi, \rho, \omega$ and $\sigma $ mesons as explicit degrees of freedom. The Lagrangian incorporates chiral symmetry and broken scale invariance. A scalar-isoscalar meson $\sigma$ is associated with a quarkonium dilaton field with a mass $\msig\approx 550 $MeV. We show that the scalar field with anomalous dimension slightly changes the static and electromagnetic properties of the nucleon. In contrast, it plays a significant role in nucleon-nucleon dynamics and gives an opportunity to describe well the two-nucleon interaction.
Meissner Ulf-G.
Rakhimov Abdulla
Yakhshiev Ulugbek
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