We present three-particle mixed-harmonic correlations $langle cos (mphi_1
+ nphi_2 - (m+n) phi_3)
angle$ for charged particles in $sqrt{s_{NN}}=$200
GeV Au+Au collisions at RHIC. These measurements provide information on the
three-dimensional structure of the initial collision zone and are important for
constraining models of a subsequent low-viscosity quark-gluon plasma expansion
phase. We find evidence for correlations between the first, second and third
harmonics predicted as a consequence of fluctuations in the initial state. The
dependence of the correlations on the pseudorapidity separation between
particles is consistent with a breaking of longitudinal invariance. While the
correlator for $m,n=2$ is well described by a hydrodynamical model with a
temperature dependent shear viscosity-to-entropy ratio, the higher harmonic
correlations are significantly under-predicted. The data suggest that models of
heavy-ion collisions need to include the longitudinal dependence of the initial
state and stronger correlations produced in the final state.
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
REGISTER
Did you like this article? 
