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          Institute: MPI für Physik     Collection: YB 2016     Display Documents



ID: 716316.0, MPI für Physik / YB 2016
Azimuthal Anisotropy in U+U and Au+Au Collisions at RHIC
Authors:STAR Collaboration; Adamczyk, L.; Schmitz, N.; Seyboth, P.; et al.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys.Rev.Lett.
Issue / Number:115
Start Page:222301
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- and four-particle cumulants, v_2{2} and v_2{4}, for charged hadrons from U+U collisions at sqrt{s_NN} = 193 GeV and Au+Au collisions at sqrt{s_NN} = 200 GeV. Nearly fully overlapping collisions are selected based on the amount of energy deposited by spectators in the STAR Zero Degree Calorimeters (ZDCs). Within this sample, the observed dependence of v_2{2} on multiplicity demonstrates that ZDC information combined with multiplicity can preferentially select different overlap configurations in U+U collisions. An initial-state model with gluon saturation describes the slope of v_2{2} as a function of multiplicity in central collisions better than one based on Glauber with a two-component multiplicity model.
Classification / Thesaurus:STAR
Comment of the Author/Creator:Final paper version accepted for publication in Phys. Rev. Lett. New version includes comparisons to a constituent quark glauber model
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2015-356
URL:http://inspirehep.net/search?p=find+eprint+1505.07...
URL:http://arXiv.org/abs/arxiv:1505.07812
URL:https://publications.mppmu.mpg.de/?action=search&m...
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