dorsal/arxiv
View SchemaThe eccentricity in heavy-ion collisions from Color Glass Condensate initial conditions
| Authors | Azfar Adil, Hans-Joachim Drescher, Adrian Dumitru, Arata Hayashigaki, Yasushi Nara |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0605012 |
| URL | https://arxiv.org/abs/nucl-th/0605012 |
| DOI | 10.1103/PhysRevC.74.044905 |
| Journal | Phys.Rev. C74 (2006) 044905 |
Abstract
The eccentricity in coordinate-space at midrapidity of the overlap zone in high-energy heavy-ion collisions predicted by the $k_\perp$-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 non-trivial but requires understanding of large-$x$ effects.
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"abstract": "The eccentricity in coordinate-space at midrapidity of the overlap zone in\nhigh-energy heavy-ion collisions predicted by the $k_\\perp$-factorization\nformalism is generically larger than expected from scaling with the number of\nparticipants. We provide a simple qualitative explanation of the effect which\nshows that it is not caused predominantly by edge effects. We also show that it\nis quite insensitive to ``details\u0027\u0027 of the unintegrated gluon distribution\nfunctions such as the presence of leading-twist shadowing and of an extended\ngeometric scaling window. The larger eccentricity increases the azimuthal\nasymmetry of high transverse momentum particles. Finally, we point out that the\nlongitudinal structure of the Color Glass Condensate initial condition for\nhydrodynamics away from midrapidity is non-trivial but requires understanding\nof large-$x$ effects.",
"arxiv_id": "nucl-th/0605012",
"authors": [
"Azfar Adil",
"Hans-Joachim Drescher",
"Adrian Dumitru",
"Arata Hayashigaki",
"Yasushi Nara"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1103/PhysRevC.74.044905",
"journal_ref": "Phys.Rev. C74 (2006) 044905",
"title": "The eccentricity in heavy-ion collisions from Color Glass Condensate initial conditions",
"url": "https://arxiv.org/abs/nucl-th/0605012"
},
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