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On the scalar meson exchange in the baryon spectra

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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http://hal.in2p3.fr/in2p3-00022913
Contributor : Lpsc Bibliotheque <>
Submitted on : Thursday, April 20, 2000 - 2:01:57 PM
Last modification on : Thursday, November 19, 2020 - 12:59:02 PM

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P. Stassart, Fl. Stancu, J.-M. Richard, L. Theussl. On the scalar meson exchange in the baryon spectra. Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, 2000, 26, pp.397-403. ⟨in2p3-00022913⟩

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