Eccentricity in heavy-ion collisions from color glass condensate initial conditions

被引：139

作者：

Adil, Azfar

Drescher, Hans-Joachim

Dumitru, Adrian

Hayashigaki, Arata

Nara, Yasushi

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

[2] Goethe Univ Frankfurt, FIAS, D-60438 Frankfurt, Germany

[3] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

来源：

PHYSICAL REVIEW C | 2006年 / 74卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.74.044905

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：

The eccentricity in coordinate space at midrapidity of the overlap zone in high-energy heavy-ion collisions predicted by the k(perpendicular to)-factorization formalism is generically larger than expected from scaling with the number of participants. We provide a simple qualitative explanation of the effect which shows that it is not caused predominantly by edge effects. We also show that it is quite insensitive to "details" of the unintegrated gluon distribution functions such as the presence of leading-twist shadowing and of an extended geometric scaling window. The larger eccentricity increases the azimuthal asymmetry of high transverse momentum particles. Finally, we point out that the longitudinal structure of the color glass condensate initial condition for hydrodynamics away from midrapidity is nontrivial but requires understanding of large-x effects.

引用

页数：6

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