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| Event-wise (Pt) fluctuations in Au-Au collisions at root sNN=130 GeV | |
| Adams, J; Adler, C; Aggarwal, MM; Cai, XZ（蔡翔舟）; Ma, YG（马余刚）; Zoulkarneev, R.; Zoulkarneeva, J.; Zubarev, AN. | |
| 2005 | |
| Source Publication | PHYSICAL REVIEW C
 |
| ISSN | 0556-2813 |
| Volume | 71Issue:6 |
| Abstract | We present the first large-acceptance measurement of event-wise mean transverse momentum < p(t)> fluctuations for Au-Au collisions at nucleon-nucleon center-of-momentum collision energy root s(NN) = 130 GeV. The observed nonstatistical < p(t)> fluctuations substantially exceed in magnitude fluctuations expected from the finite number of particles produced in a typical collision. The r.m.s. fractional width excess of the event-wise < p(t)> distribution is 13.7 +/- 0.1(stat) +/- 1.3(syst)% relative to a statistical reference, for the 15% most-central collisions and for charged hadrons within pseudorapidity range vertical bar eta vertical bar < 1,2 pi azimuth, and 0.15 <= p(t) <= 2 GeV/c. The width excess varies smoothly but nonmonotonically with collision centrality and does not display rapid changes with centrality which might indicate the presence of critical fluctuations. The reported < p(t)> fluctuation excess is qualitatively larger than those observed at lower energies and differs markedly from theoretical expectations. Contributions to < p(t)> fluctuations from semihard parton scattering in the initial state and dissipation in the bulk colored medium are discussed. |
| Indexed By | SCI |
| Language | 中文 |
| Funding Project | 应物所项目组 |
| WOS ID | WOS:000230275800053 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/9411 |
| Collection | 中科院上海应用物理研究所2004-2010年 |
| Recommended Citation GB/T 7714 | Adams, J,Adler, C,Aggarwal, MM,et al. Event-wise (Pt) fluctuations in Au-Au collisions at root sNN=130 GeV[J]. PHYSICAL REVIEW C,2005,71(6). |
| APA | Adams, J.,Adler, C.,Aggarwal, MM.,Cai, XZ.,Ma, YG.,...&Zubarev, AN..(2005).Event-wise (Pt) fluctuations in Au-Au collisions at root sNN=130 GeV.PHYSICAL REVIEW C,71(6). |
| MLA | Adams, J,et al."Event-wise (Pt) fluctuations in Au-Au collisions at root sNN=130 GeV".PHYSICAL REVIEW C 71.6(2005). |
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