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Effective Degrees of Freedom in Baryon and Meson Spectroscopy

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Abstract

We discuss some of the most relevant non-standard quark configurations in hadron spectroscopy, which are alternative to the qqq and \(q \bar{q}\) description of baryons and mesons, respectively. They include the quark-diquark and four-quark (five-quark) meson-meson (meson-baryon) bound states. To this purpose, we briefly review the diquark model of baryons and tetraquark states and the hadro-quarkonium model of heavy-light tetra- and pentaquarks. Some applications of the previous models are discussed.

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  1. Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, CT, 06520-8120, USA

    J. Ferretti

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Ferretti, J. Effective Degrees of Freedom in Baryon and Meson Spectroscopy. Few-Body Syst 60, 17 (2019). https://doi.org/10.1007/s00601-019-1483-2

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