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- Title
QCD vacuum and baryon masses.
- Authors
Mazur, Igor A.; Kim, Youngman; Harada, Masayasu; Lee, Hyun Kyu
- Abstract
To study a possible role of the quantum chromodynamics (QCD) vacuum in nuclear and hadron physics, we evaluate a physical quantity in a candidate of the QCD vacuum. In this study, we adopt the Copenhagen (spaghetti) picture of the QCD vacuum and calculate the ground state baryon masses in a constituent quark model. We find that the calculated baryon mass does depend on a parameter that characterizes the Copenhagen picture of the QCD vacuum and satisfies the Gell-Mann–Okubo mass relation for the baryon octet. We also observe that the effective constituent quark mass defined in this study contains a contribution attributed to the Copenhagen vacuum, that is the gluon background field. We then estimate the value of the background gluon field as a function of the up (down) constituent quark mass by using the baryon masses as inputs.
- Subjects
COPENHAGEN (Denmark); QUANTUM chromodynamics; BARYONS; NUCLEAR physics; QUARK models; GLUONS; QUARKS; PHYSICAL constants
- Publication
International Journal of Modern Physics E: Nuclear Physics, 2023, Vol 32, Issue 11, p1
- ISSN
0218-3013
- Publication type
Article
- DOI
10.1142/S021830132350060X