Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider
文献类型：期刊论文
| 作者 | Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Ajitanand, NN; Alekseev, I; Anderson, DM; Aoyama, R; Aparin, A |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2017 |
| 卷号 | 96期号:5页码:- |
| 关键词 | J/psi Photoproduction Peripheral Collisions Star Interference Dissociation Parameters Energies Mass Lhc |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/PhysRevC.96.054904 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The STAR Collaboration reports on the photoproduction of pi(+) pi(-) pairs in gold-gold collisions at a center-of-mass energy of 200 GeV/nucleon-pair. These pion pairs are produced when a nearly real photon emitted by one ion scatters from the other ion. We fit the pi(+) pi(-) invariant-mass spectrum with a combination of rho(0) and omega resonances and a direct pi(+) pi(-) continuum. This is the first observation of the omega in ultraperipheral collisions, and the first measurement of rho-omega interference at energies where photoproduction is dominated by Pomeron exchange. The omega amplitude is consistent with the measured gamma p -> omega p cross section, a classical Glauber calculation, and the omega -> pi(+) pi(-) branching ratio. The omega phase angle is similar to that observed at much lower energies, showing that the rho-omega phase difference does not depend significantly on photon energy. The rho(0) differential cross section d sigma/dt exhibits a clear diffraction pattern, compatible with scattering from a gold nucleus, with two minima visible. The positions of the diffractive minima agree better with the predictions of a quantum Glauber calculation that does not include nuclear shadowing than with a calculation that does include shadowing. |
| WOS关键词 | J/PSI PHOTOPRODUCTION ; PERIPHERAL COLLISIONS ; STAR ; INTERFERENCE ; DISSOCIATION ; PARAMETERS ; ENERGIES ; MASS ; LHC |
| 语种 | 英语 |
| WOS记录号 | WOS:000414957500004 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/28582]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Adamczyk, L,Adkins, JK,Agakishiev, G,et al. Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider[J]. PHYSICAL REVIEW C,2017,96(5):-. |
| APA | Adamczyk, L.,Adkins, JK.,Agakishiev, G.,Aggarwal, MM.,Ahammed, Z.,...&Zyzak, M.(2017).Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider.PHYSICAL REVIEW C,96(5),-. |
| MLA | Adamczyk, L,et al."Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider".PHYSICAL REVIEW C 96.5(2017):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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