Abstract
We consider that most of the long-range forward-backward multiplicity (FB) correlations in high energy collisions are caused by the centrality fluctuation, and this phenomenon interferes with the measurement of the dynamical correlations greatly. We investigate the relationship between FB correlation strength and centrality by a Monte Carlo simulation and a derivation which are tested by A MultiPhases Transport (AMPT) model in Au+Au collisions at GeV. We compare the FB correlation strengths of AMPT model with the results of the derivation at to 200 GeV. A comparison between the default AMPT model and string melting AMPT model with different partonic scattering sections is made. As a result, we consider that the FB correlation strengths may be dominated by the mixing of different centrality events, and the short-range correlation may be overwhelmed for the most central collisions.
2 More- Received 1 February 2016
- Revised 7 March 2016
DOI:https://doi.org/10.1103/PhysRevC.93.044918
©2016 American Physical Society