Charged-to-neutral correlation at forward rapidity in Au + Au collisions at √s[subscript NN] = 200 GeV
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PhysRevC.91.034905.pdf
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Author(s)
Adamczyk, L.
Adkins, J. K.
Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alekseev, I.
Alford, J.
Anson, C. D.
Aparin, A.
Arkhipkin, D.
Date Issued
March 2015
Journal
Physical Review C
Publisher
American Physical Society
Citation
Adamczyk, L., J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, et al. “Charged-to-neutral correlation at forward rapidity in Au + Au collisions at √s[subscript NN] = 200 GeV.” Phys. Rev. C 91, no. 3 (March 2015). © 2015 American Physical Society
Version
Final published version
Abstract
Event-by-event fluctuations of the multiplicities of inclusive charged particles and photons at forward rapidity in Au+Au collisions at √s[subscript NN] = 200 GeV have been studied. The dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidence of dynamical fluctuations of different physical origins. Observables constructed out of moments of multiplicities are used as measures of fluctuations. Mixed events and model calculations are used as base lines. Results are compared to the dynamical net-charge fluctuations measured in the same acceptance. A nonzero statistically significant signal of dynamical fluctuations is observed in excess to the model prediction when charged particles and photons are measured in the same acceptance. We find that, unlike dynamical net-charge fluctuation, charge-neutral fluctuation is not dominated by correlation owing to particle decay. Results are compared to the expectations based on the generic production mechanism of pions owing to isospin symmetry, for which no significant (<1%) deviation is observed.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.91.034905
