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dc.contributor.authorSTAR Collaboration
Butterworth, J.
Eppley, G.
Geurts, F.
Llope, W.J.
McDonald, D.
Roberts, J.B.
Xin, K.
Yepes, P.
dc.date.accessioned 2015-05-13T20:17:19Z
dc.date.available 2015-05-13T20:17:19Z
dc.date.issued 2014
dc.identifier.citation STAR Collaboration, Butterworth, J., Eppley, G., et al.. "Measurement of charge multiplicity asymmetry correlations in high-energy nucleus-nucleus collisions at √sNN=200 GeV." Physical Review C, 89, no. 4 (2014) American Physical Society: 44908. http://dx.doi.org/10.1103/PhysRevC.89.044908.
dc.identifier.urihttps://hdl.handle.net/1911/80212
dc.description.abstract A study is reported of the same- and opposite-sign charge-dependent azimuthal correlations with respect to the event plane in Au + Au collisions at √sNN=200 GeV. The charge multiplicity asymmetries between the up/down and left/right hemispheres relative to the event plane are utilized. The contributions from statistical fluctuations and detector effects were subtracted from the (co-)variance of the observed charge multiplicity asymmetries. In the mid- to most-central collisions, the same- (opposite-) sign pairs are preferentially emitted in back-to-back (aligned on the same-side) directions. The charge separation across the event plane, measured by the difference, Δ, between the like- and unlike-sign up/down-left/right correlations, is largest near the event plane. The difference is found to be proportional to the event-by-event final-state particle ellipticity (via the observed second-order harmonic vobs2), where Δ=[1.3±1.4(stat)+4.0−1.0(syst)]×10−5+[3.2±0.2(stat)+0.4−0.3(syst)]×10−3vobs2 for 20–40% Au + Au collisions. The implications for the proposed chiral magnetic effect are discussed.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Measurement of charge multiplicity asymmetry correlations in high-energy nucleus-nucleus collisions at √sNN=200 GeV
dc.type Journal article
dc.citation.journalTitle Physical Review C
dc.citation.volumeNumber 89
dc.citation.issueNumber 4
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevC.89.044908
dc.type.publication publisher version
dc.citation.firstpage 44908


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