Interplay between quark-antiquark and diquark condensates in vacuum in a two-flavor nambu-jona-lasinio model
文献类型：期刊论文
| 作者 | Zhou Bang-Rong |
| 刊名 | Communications in theoretical physics
 |
| 出版日期 | 2007 |
| 卷号 | 47期号:1页码:95-101 |
| ISSN号 | 0253-6102 |
| 关键词 | Nambu-jona-lasinio model Quark-antiquark condensates Diquark condensates Effective potential Chiral symmetry breaking Color-superconductivity |
| 通讯作者 | Zhou bang-rong() |
| 英文摘要 | By means of a relativistic effective potential, we analytically research competition between the quark-antiquark condensates <(q) over barq > and the diquark condensates < qq > in vacuum in ground state of a two-flavor nambu-jona-lasinio (njl) model and obtain the g(s)-h-s phase diagram, where g(s) and h-s are the respective four-fermion coupling constants in scalar quark-antiquark channel and scalar color anti-triplet diquark channel. the results show that, in the chiral limit, there is only the pure <(q) over barq > phase when g(s)/h-s > 2/3, and as g(s)/h-s decreases to 2/3 > g(s)/h-s >= 0 one will first have a coexistence phase of the condensates <(q) over barq > and < qq > and then a pure < qq > phase. in non-zero bare quark mass case, the critical value of g(s)/h-s at which the pure < qq > phase will transfer to the coexistence phase of the condensates <(q) over barq > and < qq > will be less than 2/3. our theoretical results, combined with present phenomenological fact that there is no diquark condensates in the vacuum of qcd, will also impose a real restriction to any given two-flavor njl model which is intended to simulate qcd, i.e. in such model the resulting smallest ratio g(s)/h-s after the fierz transformations in the hartree approximation must be larger than 2/3. a few phenomenological qcd-like njl models are checked and analyzed. |
| WOS关键词 | CHIRAL-SYMMETRY-BREAKING ; MASS INEQUALITIES ; DYNAMICAL MODEL ; GAUGE-THEORY ; SUPERCONDUCTIVITY ; TEMPERATURE ; PARTICLES ; DENSITY ; MATTER ; RESTORATION |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | INTERNATIONAL ACADEMIC PUBLISHERS LIMITED |
| WOS记录号 | WOS:000243764900019 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2383476 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhou Bang-Rong |
| 作者单位 | 1.Chinese Acad Sci, Grad Sch, Coll Phys Sci, Beijing 100049, Peoples R China 2.CCAST, World Lab, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou Bang-Rong. Interplay between quark-antiquark and diquark condensates in vacuum in a two-flavor nambu-jona-lasinio model[J]. Communications in theoretical physics,2007,47(1):95-101. |
| APA | Zhou Bang-Rong.(2007).Interplay between quark-antiquark and diquark condensates in vacuum in a two-flavor nambu-jona-lasinio model.Communications in theoretical physics,47(1),95-101. |
| MLA | Zhou Bang-Rong."Interplay between quark-antiquark and diquark condensates in vacuum in a two-flavor nambu-jona-lasinio model".Communications in theoretical physics 47.1(2007):95-101. |
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来源：中国科学院大学
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