Non-flow correlations and elliptic flow fluctuations in Au + Au collisions at GeV

Abstract

We present first results on event-by-event elliptic flow fluctuations in nucleus–nucleus collisions corrected for effects of non-flow correlations where the magnitude of non-flow correlations has been independently measured in data. Over the measured range in centrality, we see large relative fluctuations of 25–50%. The results are consistent with predictions from both color glass condensate and Glauber type initial condition calculations of the event-by-event participant eccentricity fluctuations.