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Scalar meson exchange and the baryon spectra

P. Stassart·Fl. Stancu·J. -M. Richard
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Abstract

We explore the role of a scalar meson exchange interaction between quarks in a semirelativistic constituent quark model where the quarks are also subject to a linear confinement. We search for a variational solution and study how the spectrum evolves when the strength of the scalar meson exchange increases. Our results have good implications on the description of the low-lying baryon masses, especially on the long-standing problem of the relative position of the first positive-parity (Roper resonance) and the first orbitally excited states.

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P. Stassart, Fl. Stancu, J. -M. Richard. 1999-05-06. Scalar meson exchange and the baryon spectra. https://doi.org/10.1088/0954-3899%2F26%2F4%2F306

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