Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions - INSPIRE

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Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions

STAR

Collaboration

Apr 8, 2015

6 pages

Published in:

Phys.Rev.Lett. 114 (2015) 25, 252302

Published: Jun 26, 2015

e-Print:

1504.02175 [nucl-ex]

DOI:

10.1103/PhysRevLett.114.252302

Experiments:

BNL-RHIC-STAR

View in:

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reference search139 citations

Citations per year

Abstract: (APS)

We present measurements of π- and π+ elliptic flow, v2, at midrapidity in Au+Au collisions at sNN=200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV, as a function of event-by-event charge asymmetry, Ach, based on data from the STAR experiment at RHIC. We find that π- (π+) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality bins at sNN=27 GeV and higher. At sNN=200 GeV, the slope of the difference of v2 between π- and π+ as a function of Ach exhibits a centrality dependence, which is qualitatively similar to calculations that incorporate a chiral magnetic wave effect. Similar centrality dependence is also observed at lower energies.

Note:

6 pages, 4 figures

25.75.-q
25.75.Ld
charge: asymmetry
wave: magnetic
chiral
pi: elliptic flow
heavy ion: scattering
quark gluon
gold
rapidity

References(53)

Figures(4)

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