Production of Lambda Lambda and (Lambda n)over-bar in central Pb plus Pb collisions at root sNN=2.76 TeV within a covariant coalescence model
文献类型：期刊论文
| 作者 | Sun, Kai-Jia1,2; Chen, Lie-Wen1,2,3 |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2016-12-27 |
| 卷号 | 94页码:6 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/PhysRevC.94.064908 |
| 英文摘要 | We study the production of Lambda Lambda and (Lambda n) over bar exotic states in central Pb + Pb collisions at root sNN = 2.76 TeV at the CERNLarge Hadron Collider (LHC) via both hadron and quark coalescence within a covariant coalescence model with a blast-wave-like parametrization for the phase-space configurations of constituent particles at freeze-out. In the hadron coalescence, the two states are considered as molecular states while they are considered as six-quark states in the quark coalescence. For (Lambda n) over bar, we find that the yields of both molecular and six-quark states are much larger than the experimental upper- limits. For Lambda Lambda, while the molecule-state yield is much larger than the experimental upper limits, the six-quark-state yield could be lower than the upper limits. The higher molecule-state yields are mainly due to the large contribution of short- lived strong resonance decays into (anti-) nucleons and (anti-)Lambda which can significantly enhance the molecule- state yields of Lambda Lambda and (Lambda n) over bar via hadron coalescence. Our results suggest that the current experimental measurement at the LHC cannot exclude the existence of the Lambda Lambda as an exotic six-quark state, and if Lambda Lambda is a six-quark state, it is then on the brink of being discovered. |
| WOS关键词 | HEAVY-ION COLLISIONS ; STRANGENESS |
| 资助项目 | Major State Basic Research Development Program (973 Program) in China[2015CB856904] ; Major State Basic Research Development Program (973 Program) in China[2013CB834405] ; NSFC[11625521] ; NSFC[11275125] ; NSFC[11135011] ; Shanghai Municipal Education Commission ; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education, Chin ; Science and Technology Commission of Shanghai Municipality[11DZ2260700] ; Shanghai Education Development Foundation |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000391015100010 |
| 资助机构 | Major State Basic Research Development Program (973 Program) in China ; NSFC ; Shanghai Municipal Education Commission ; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education, Chin ; Science and Technology Commission of Shanghai Municipality ; Shanghai Education Development Foundation |
| 源URL | [http://119.78.100.186/handle/113462/44083]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Chen, Lie-Wen |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China 3.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Kai-Jia,Chen, Lie-Wen. Production of Lambda Lambda and (Lambda n)over-bar in central Pb plus Pb collisions at root sNN=2.76 TeV within a covariant coalescence model[J]. PHYSICAL REVIEW C,2016,94:6. |
| APA | Sun, Kai-Jia,&Chen, Lie-Wen.(2016).Production of Lambda Lambda and (Lambda n)over-bar in central Pb plus Pb collisions at root sNN=2.76 TeV within a covariant coalescence model.PHYSICAL REVIEW C,94,6. |
| MLA | Sun, Kai-Jia,et al."Production of Lambda Lambda and (Lambda n)over-bar in central Pb plus Pb collisions at root sNN=2.76 TeV within a covariant coalescence model".PHYSICAL REVIEW C 94(2016):6. |
入库方式： OAI收割
来源：近代物理研究所
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