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Measurement of flow harmonics with multi-particle cumulants in Pb plus Pb collisions at root(NN)-N-S=2.76 TeV with the ATLAS detector
ATLAS collaboration
2014
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号74期号:11
通讯作者Aad, G (reprint author), Aix Marseille Univ, CPPM, Marseille, France.
摘要ATLAS measurements of the azimuthal anisotropy in lead-lead collisions at root(NN)-N-S = 2.76 TeV are shown using a dataset of approximately 7 mu b(-1) collected at the LHC in 2010. The measurements are performed for charged particles with transverse momenta 0.5 < p(T) < 20 GeV and in the pseudorapidity range vertical bar eta vertical bar < 2.5. The anisotropy is characterized by the Fourier coefficients, vn, of the charged-particle azimuthal angle distribution for n = 2-4. The Fourier coefficients are evaluated using multi-particle cumulants calculated with the generating function method. Results on the transverse momentum, pseudorapidity and centrality dependence of the v(n) coefficients are presented. The elliptic flow, v(2), is obtained from the two-, four-, six-and eight-particle cumulants while higher-order coefficients, v(3) and v(4), are determined with two-and four-particle cumulants. Flow harmonics v(n) measured with four-particle cumulants are significantly reduced compared to the measurement involving two-particle cumulants. A comparison to v(n) measurements obtained using different analysis methods and previously reported by the LHC experiments is also shown. Results of measurements of flow fluctuations evaluated with multiparticle cumulants are shown as a function of transverse momentum and the collision centrality. Models of the initial spatial geometry and its fluctuations fail to describe the flow fluctuations measurements.
关键词QUARK-GLUON PLASMA NUCLEAR COLLISIONS TRANSVERSE-MOMENTUM ROOT-S(NN)=2.76 TEV ANISOTROPIC FLOW PERSPECTIVE
学科领域Physics
DOI10.1140/epjc/s10052-014-3157-z
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000347177000001
引用统计
被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213843
专题实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
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ATLAS collaboration. Measurement of flow harmonics with multi-particle cumulants in Pb plus Pb collisions at root(NN)-N-S=2.76 TeV with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(11).
APA ATLAS collaboration.(2014).Measurement of flow harmonics with multi-particle cumulants in Pb plus Pb collisions at root(NN)-N-S=2.76 TeV with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,74(11).
MLA ATLAS collaboration."Measurement of flow harmonics with multi-particle cumulants in Pb plus Pb collisions at root(NN)-N-S=2.76 TeV with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 74.11(2014).
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