Gluonic contributions in a four-fermion interaction model
文献类型：期刊论文
| 作者 | Jiang, WZ（蒋维洲） ; Qiu, XJ（邱锡钧） ; Zhu, ZY（朱志远） ; He, ZJ（贺泽君） |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2002 |
| 卷号 | 65期号:1 |
| ISSN号 | 0556-2813 |
| 英文摘要 | The gap equation for the fermion in nuclear medium is obtained in a two-flavor gauged Nambu-Jona-Lasino (NJL) model using the Schwinger-Dyson (SD) equations. The gap equation is solved with a quenched truncation. Compared to the four-fermion interaction, the one-gluon-exchange interaction accounts for considerable contributions (about 15-50%) to dynamically generated fermion mass. With incorporation of gluonic contributions into a scheme where there is only four-fermion interaction, the four-fermion coupling constant is made density dependent. Impacts of the density-dependent four-fermion (DDFF) coupling constants on quantities,, such as the fermion mass and the chiral order parameter as well as masses of mesons (sigma, pi), are estimated, The DDFF coupling constants lead to less density dependence of hadron masses and the larger critical density of chiral symmetry restoration than those from the pure four-fermion interaction, The calculated quantities are somehow dependent on the confinement scale Lambda(QCD). However, the range of Lambda(QCD) in the present parametrization can be determined by the saturation property of the gluonic contribution in the medium and it turns out quite small. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000173308000052 |
| 公开日期 | 2012-09-25 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/9982]  |
| 专题 | 上海应用物理研究所_中科院上海原子核所2003年前 |
| 推荐引用方式 GB/T 7714 | Jiang, WZ,Qiu, XJ,Zhu, ZY,et al. Gluonic contributions in a four-fermion interaction model[J]. PHYSICAL REVIEW C,2002,65(1). |
| APA | Jiang, WZ,Qiu, XJ,Zhu, ZY,&He, ZJ.(2002).Gluonic contributions in a four-fermion interaction model.PHYSICAL REVIEW C,65(1). |
| MLA | Jiang, WZ,et al."Gluonic contributions in a four-fermion interaction model".PHYSICAL REVIEW C 65.1(2002). |
入库方式： OAI收割
来源：上海应用物理研究所
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