HATSUDA, T and KUNIHIRO, T (1992) STRANGE QUARK, HEAVY QUARK AND GLUON CONTENTS OF LIGHT HADRONS. NUCLEAR PHYSICS B, 387 (3). pp. 715-742. ISSN 0550-3213,
Full text not available from this repository.Abstract
The sea-quark content of baryons (such as ssBAR, ccBAR, bbBAR...) is calculated by a combined use of the QCD trace anomaly and a chiral quark model. The result is applied to the examination of the explicit symmetry breaking in baryons, the intrinsic heavy quarks in baryons, and the Higgs-baryon coupling constants. We find that (i) the small ssBAR content, large piN sigma term (approximately 45 MeV) and the Gell-Mann-Okubo mass formula for baryons are consistently explained contrary to the naive argument based on the lowest-order expansion by the current quark masses. The basic point is the non-linear dependence of the physical quantities on the strange quark mass. (ii) The probability of finding charm in the nucleon is about 0.5%, which is relevant to the charm structure function of the nucleon at large x(Bj) and also to the charm production in proton-nucleus collisions at large Feynman x(F). (iii) Both strange and heavy quarks are equally important for the Higgs-nucleon coupling. Small but non-negligible OZI violation in baryons due to the axial anomaly plays a key role in all the above quantities. The sea-quark content of the pion and the kaon and the color-sextet quark content in the nucleon are also discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHIRAL PERTURBATION-THEORY; JONA-LASINIO MODEL; HIGGS-BOSON; SYMMETRY-BREAKING; SIGMA-TERM; SEXTET QUARKS; LOW-ENERGY; SUF(3) BREAKING; NUCLEON; BARYONS; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54255 |
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