Baryon–baryon interactions at short distances: constituent quark model meets lattice QCD

Aaron Park, Su Houng Lee, Takashi Inoue, Tetsuo Hatsuda

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12 Citations (Scopus)


The interaction energies between two baryons at short distance in different flavor channels are calculated from the constituent quark model (CQM) and are compared with the recent lattice QCD (LQCD) results for baryon–baryon potentials at short distance. We consider the six-quark system with two strange quarks and focus on the quantum numbers, (Flavor, Spin) = (1, 0), (8, 1), (10, 1), (10 ¯ , 1) and (27, 0). The interaction energy is defined by subtracting out isolated baryon masses and relative kinetic energy of two baryons from the total energy of a compact six-quark state. We introduce interaction energy ratio between different flavors as a useful measure to test the prediction of CQM. We find that the ratios in CQM show good agreement with those in LQCD, which indicates that the short range part of the baryon-baryon interaction can be understood qualitatively in terms of the Pauli principle and spin-dependent color interaction among constituent quarks.

Original languageEnglish
Article number93
JournalEuropean Physical Journal A
Issue number3
Publication statusPublished - 2020 Mar 1

Bibliographical note

Funding Information:
The work by SHL was supported by Samsung Science and Technology Foundation under Project Number SSTF-BA1901-04. This work by AP was supported by the Korea National Research Foundation under the grant number 2018R1D1A1B07043234. The work by T.H. was supported by JSPS Grant-in-Aid for Scientific Research (S), No. 18H05236. We thank H. Nemura for carefully reading the manuscript.

Publisher Copyright:
© 2020, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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