Evolution of pressures and correlations in the glasma produced in high energy nuclear collisions
文献类型：期刊论文
| 作者 | Greco, V; Peng GX(彭光雄) ; Oliva, L; Liu, JH; Ruggieri, M; Peng, GX
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2018 |
| 卷号 | 97期号:7页码:76004 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.97.076004 |
| 文献子类 | Article |
| 英文摘要 | We consider the SU(2) glasma with Gaussian fluctuations and study its evolution by means of classical Yang-Mills equations solved numerically on a lattice. Neglecting in this first study the longitudinal expansion, we follow the evolution of the pressures of the system and compute the effect of the fluctuations in the early stage up to t approximate to 2 fm/c, that is the time range in which the glasma is relevant for high energy collisions. We measure the ratio of the longitudinal over the transverse pressure, P-L/P-T, and we find that unless the fluctuations carry a substantial amount of the energy density at the initial time, they do not change significantly the evolution of P-L/P-T in the early stage and that the system remains quite anisotropic. We also measure the longitudinal fields correlators both in the transverse plane and along the longitudinal direction: while at initial time fields appear to be anticorrelated in the transverse plane, this anticorrelation disappears in the very early stage, and the correlation length in the transverse plane increases. On the other hand, we find a dependence of the gauge invariant correlator on the longitudinal coordinate, which we interpret as a partial loss of correlation induced by the dynamics that we dub the gauge invariant string breaking. We finally study the effect of fluctuations on the longitudinal correlations: we find that string breaking is accelerated by the fluctuations and waiting for a sufficiently long time fluctuations lead to the complete breaking of the color strings. |
| 电子版国际标准刊号 | 2470-0029 |
| WOS关键词 | GLUON PRODUCTION ; FIELDS ; MODEL |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000429456900009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285814]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Greco, V,Peng GX,Oliva, L,et al. Evolution of pressures and correlations in the glasma produced in high energy nuclear collisions[J]. PHYSICAL REVIEW D,2018,97(7):76004. |
| APA | Greco, V,彭光雄,Oliva, L,Liu, JH,Ruggieri, M,&Peng, GX.(2018).Evolution of pressures and correlations in the glasma produced in high energy nuclear collisions.PHYSICAL REVIEW D,97(7),76004. |
| MLA | Greco, V,et al."Evolution of pressures and correlations in the glasma produced in high energy nuclear collisions".PHYSICAL REVIEW D 97.7(2018):76004. |
入库方式： OAI收割
来源：高能物理研究所
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