On the Nucleon Stability and Sigma_N Term Puzzles
| dc.creator | Ying, S. | |
| dc.date | 2000-06-12 | |
| dc.date | 2000-06-19 | |
| dc.date.accessioned | 2026-07-07T03:41:40Z | |
| dc.date.available | 2026-07-07T03:41:40Z | |
| dc.description | A stable soliton configuration for a nucleon emerges when the nucleon stability and $Σ_N$ term discrepancy problems are studied semi-quantitatively within a local theory developed recently. The approach developed here goes beyond the mean field or Hartree-Fock approximation by taking into account of the non-perturbative wave function renormalization in a way that is consistent with the chiral Ward-Takahashi identities of QCD. The stability condition for a nucleon and the recently extracted nucleon $Σ_N$ term are used to estimate the radius of the soliton. It is found that 0.67 fm $\le R \le$ 0.78 fm. A new mechanism for the stability of a nucleon is proposed. The discrepancy between the nucleon $Σ_N$ term extracted from pion--nucleon scattering data and the one from baryonic spectra is resolved by assuming the existence of a metastable virtual color superconducting phase for the strong interaction vacuum. Under such a scenario, the difference between the energy density of the chiral symmetry breaking phase and the metastable color superconducting phase is found to be 0.41 GeV/fm$^3$ $\le Δε\le $ 0.85 GeV/fm$^3$. | |
| dc.description | 22 pages, 8 figures, 2 tables, references are added | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0006111 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0006111 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/39664 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Lattice | |
| dc.subject | Nuclear Theory | |
| dc.title | On the Nucleon Stability and Sigma_N Term Puzzles | |
| dc.type | text |