Charge-dependent correlations from both background and charge separation contribute to experimental observables in heavy-ion collisions.In this paper,we use stochastic hydrodynamics to study background charge asymmetr...Charge-dependent correlations from both background and charge separation contribute to experimental observables in heavy-ion collisions.In this paper,we use stochastic hydrodynamics to study background charge asymmetry due to fluctuations.Using the rapidity-dependent correlation and a simple ansatz for particle distributions,we find a fluctuation-induced correlation to provide a type of background F-correlation.Experimental data for Au+Au collisions at(sNN)1/2=200 GeV are compared.We also make predictions for F-correlations in isobar collisions.Combining this with our previous chiral magnetic effect results,we obtainδ-correlations for collisions in the three types of system.Computations from our model show an almost identical background with less than 2%difference for isobars,but roughly 10%difference for their charge separations.In combination with our earlier works,we provide a consistent method of calculating both the chiral magnetic effect and the charged background in the context of stochastic hydrodynamics.展开更多
文摘Charge-dependent correlations from both background and charge separation contribute to experimental observables in heavy-ion collisions.In this paper,we use stochastic hydrodynamics to study background charge asymmetry due to fluctuations.Using the rapidity-dependent correlation and a simple ansatz for particle distributions,we find a fluctuation-induced correlation to provide a type of background F-correlation.Experimental data for Au+Au collisions at(sNN)1/2=200 GeV are compared.We also make predictions for F-correlations in isobar collisions.Combining this with our previous chiral magnetic effect results,we obtainδ-correlations for collisions in the three types of system.Computations from our model show an almost identical background with less than 2%difference for isobars,but roughly 10%difference for their charge separations.In combination with our earlier works,we provide a consistent method of calculating both the chiral magnetic effect and the charged background in the context of stochastic hydrodynamics.
