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Journal ArticleDOI

Review of spectroscopy and strong decays of heavy baryons

01 Apr 1997-Vol. 55, Iss: 1, pp 27-32

Abstract: Models which are used to examine both masses and decays of the baryons are considered. One major question of interest is the exact nature of the inter quark potential. Since baryon spectroscopy samples a different region of this potential then meson spectroscopy, it is of some interest to compare fits to both sets of data. Of even more interest would be an experiment starting with quarks placed fairly far apart and than moving them closer together. In the absence of such an experiment, the distance is varied by charging the quark flavour. Thus, changing from light u, d and s quarks to the c and b quarks yields a wealth of information about the inter quark potential.
Topics: Omega baryon (64%), Charm quark (64%), Baryon (63%), Xi baryon (63%), Up quark (63%)
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Abstract: The use of a linear combination of Gaussian‐type orbitals (CGTO), instead of an individual Gaussian‐type orbital (GTO), as a unit of basis functions for large‐scale molecular calculations, is discussed. A systematic construction of the CGTO basis functions is attempted and the results for the atoms from Li through Ar are reported.

3,245 citations

01 Jan 1988

241 citations

Journal ArticleDOI
Abstract: An improved QCD-inspired quark potential is introduced and employed to calculate baryon spectra. This potential has some novel features: (i) the one-gluon exchange potential in it is derived from the exact three-dimensional relativistic equation and contains a retardation term which is logarithmic; (ii) the confining part of the potential is generated from a linear potential Bethe-Salpeter (BS) kernel and a general Lorentz structure of the confinement and includes therefore various spin-dependent terms added to the linear potential; (iii) the off-shell correction part of the potential which is related to the negative energy component of the BS amplitude automatically gives rise to a harmonic oscillator term. We analyse the contributions of all parts of the potential to the baryon spectrum and find that the potential we use makes some improvements to theoretical baryon masses, especially for the Roper resonance.

10 citations

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