Azimuthally differential pion femtoscopy in Pb-Pb collisions at 2.76 TeV with ALICE at the LHC

被引：7

作者：

Loggins, Vera ^{[1
]}

机构：

[1] Wayne State Univ, Detroit, MI 48202 USA

来源：

NUCLEAR PHYSICS A | 2014年 / 931卷

关键词：

LHC; ALICE; Femtoscopy; Radii oscillation; Final eccentricity; Freeze-out; HEAVY-ION COLLISIONS;

D O I：

10.1016/j.nuclphysa.2014.08.061

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Femtoscopy of non-central heavy-ion collisions provides access to information on the geometry of the effective pion-emitting source. In particular, the source shape can be studied by measuring femtoscopic radii as a function of the pion emission angle relative to the collision symmetry planes. We present the results of azimuthally differential femtoscopy of Pb-Pb collisions at root(NN)-N-S = 2.76 TeV at the LHC relative to the second harmonic event plane. We observe a clear oscillation of the extracted radii as a function of the emission angle. We find that R-side and R-out oscillate out of phase for all centralities and pion transverse momenta. The relative amplitude of R-side oscillation decreases in more central collisions, but remains positive, which indicates that the source remains out-of-plane extended qualitatively similar to what was observed at RHIC energies. We compare our results to existing hydrodynamical and transport model calculations. (C) 2014 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：1088 / 1092

页数：5

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