Liu H, Ajitanand NN, Alexander J, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance J, Cole B, Crowe K, Das A, Draper J, Gilkes M, Gushue S, Heffner M, Hirsch A, Hjort E, Huo L, Justice M, Kaplan M, Keane D, Kintner J, Klay J, Krofcheck D
Kent State University, Kent, Ohio 44242, USA.
Phys Rev Lett. 2000 Jun 12;84(24):5488-92. doi: 10.1103/PhysRevLett.84.5488.
Using the large acceptance Time Projection Chamber of experiment E895 at Brookhaven, measurements of collective sideward flow in Au+Au collisions at beam energies of 2A, 4A, 6A, and 8A GeV are presented in the form of in-plane transverse momentum <p(x)> and the first Fourier coefficient of azimuthal anisotropy v(1). These measurements indicate a smooth variation of sideward flow as a function of beam energy. The data are compared with four nuclear transport models which have an orientation towards this energy range. All four exhibit some qualitative trends similar to those found in the data, although none show a consistent pattern of agreement within experimental uncertainties.
利用布鲁克海文国家实验室E895实验的大接受度时间投影室，给出了在2A GeV、4A GeV、6A GeV和8A GeV束流能量下金离子与金离子碰撞中集体侧向流的测量结果，测量结果以面内横向动量<p(x)>和方位角各向异性的第一傅里叶系数v(1)的形式呈现。这些测量结果表明侧向流随束流能量呈平滑变化。将数据与四种针对该能量范围的核输运模型进行了比较。尽管在实验不确定度范围内，没有一个模型表现出一致的符合模式，但所有四个模型都表现出一些与数据中发现的定性趋势相似的趋势。
