rho(0) photoproduction in ultraperipheral relativistic heavy ion collisions at root s(NN)=200 GeV
文献类型：期刊论文
| 作者 | Abelev, B. I.1,11; Aggarwal, M. M.33; Ahammed, Z.48; Anderson, B. D.21; Arkhipkin, D.15; Averichev, G. S.14; Bai, Y.30,31; Balewski, J.19; Barannikova, O.1,11; Barnby, L. S.3 |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2008-03-01 |
| 卷号 | 77页码:11 |
| ISSN号 | 0556-2813 |
| DOI | 10.1103/PhysRevC.77.034910 |
| 英文摘要 | Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts with another heavy ion. The STAR Collaboration presents a measurement of rho(0) and direct pi(+)pi(-) photoproduction in ultraperipheral relativistic heavy ion collisions at root s(NN) = 200 GeV. We observe both exclusive photoproduction and photoproduction accompanied by mutual Coulomb excitation. We find a coherent cross section of sigma(AuAu -> Au*Au*rho(0)) = 530 +/- 19(stat.) +/- 57(syst.) mb, in accord with theoretical calculations based on a Glauber approach, but considerably below the predictions of a color dipole model. The rho 0 transverse momentum spectrum (p(T)(2)) is fit by a double exponential curve including both coherent and incoherent coupling to the target nucleus; we find sigma(inc)/sigma(coh) = 0.29 +/- 0.03 (stat.) +/- 0.08 (syst.). The ratio of direct pi(+)pi(-) to rho(0) production is comparable to that observed in gamma(p) collisions at HERA and appears to be independent of photon energy. Finally, the measured rho(0) spin helicity matrix elements agree within errors with the expected s-channel helicity conservation. |
| WOS关键词 | TIME PROJECTION CHAMBER ; VECTOR-MESON PRODUCTION ; DIFFRACTIVE PRODUCTION ; PROTON SCATTERING ; COMPLEX NUCLEI ; PHOTON ; HERA ; COLLIDERS ; ENERGIES ; PHYSICS |
| 资助项目 | Science and Technology Facilities Council[PP/F001061/1] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000254543500050 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/29367]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Abelev, B. I. |
| 作者单位 | 1.Univ Illinois, Chicago, IL 60607 USA 2.Argonne Natl Lab, Argonne, IL 60439 USA 3.Univ Birmingham, Birmingham, W Midlands, England 4.Brookhaven Natl Lab, Upton, NY 11973 USA 5.CALTECH, Pasadena, CA 91125 USA 6.Univ Calif Berkeley, Berkeley, CA 94720 USA 7.Univ Calif Davis, Davis, CA 95616 USA 8.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 9.Univ Estadual Campinas, Sao Paulo, Brazil 10.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA |
| 推荐引用方式 GB/T 7714 | Abelev, B. I.,Aggarwal, M. M.,Ahammed, Z.,et al. rho(0) photoproduction in ultraperipheral relativistic heavy ion collisions at root s(NN)=200 GeV[J]. PHYSICAL REVIEW C,2008,77:11. |
| APA | Abelev, B. I..,Aggarwal, M. M..,Ahammed, Z..,Anderson, B. D..,Arkhipkin, D..,...&Zuo, J. X..(2008).rho(0) photoproduction in ultraperipheral relativistic heavy ion collisions at root s(NN)=200 GeV.PHYSICAL REVIEW C,77,11. |
| MLA | Abelev, B. I.,et al."rho(0) photoproduction in ultraperipheral relativistic heavy ion collisions at root s(NN)=200 GeV".PHYSICAL REVIEW C 77(2008):11. |
入库方式： OAI收割
来源：近代物理研究所
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