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Forward-backward multiplicity correlations in sNN=200 GeV Au+Au collisions

B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, R. R. Betts, A. A. Bickley, R. Bindel, A. Budzanowski, W. Busza, A. Carroll, Z. Chai, M. P. Decowski, E. Garcı́a, T. Gburek, N. George, K. Gulbrandsen, S. Gushue, C. Halliwell, J. Hamblen, M. Hauer, G. A. Heintzelman, C. Henderson, D. J. Hofman, R. S. Hollis, R. Hołyński, B. Holzman, A. Iordanova, E. Johnson, J. L. Kane, J. Katzy, N. Khan, W. Kucewicz, P. Kulinich, C. M. Kuo, W.T. Lin, S. Manly, D. McLeod, A. C. Mignerey, R. Noucier, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, L. P. Remsberg, M. Reuter, C. Roland, G. Roland, L. J. Rosenberg, J. Sagerer, Pankaj Sarin, P. Sawicki, H. Seals, I. Sedykh, W. Skulski, Christopher Smith, M. A. Stankiewicz, P. Steinberg, G. S. F. Stephans, A. Sukhanov, J.-L. Tang, M. B. Tonjes, A. Trzupek, C. Vale, G. J. van Nieuwenhuizen, S. S. Vaurynovich, R. Verdier, G. I. Veres, E. A. Wenger, F. L. H. Wolfs, B. K. Wosiek, K. W. Woźniak, A. H. Wuosmaa, B. Wysłouch

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Abstract

Forward-backward correlations of charged-particle multiplicities in symmetric bins in pseudorapidity are studied to gain insight into the underlying correlation structure of particle production in Au+Au collisions. The PHOBOS detector is used to measure integrated multiplicities in bins centered at \ensuremath{\eta}, defined within $|\ensuremath{\eta}|<3$, and covering intervals $\ensuremath{\Delta}\ensuremath{\eta}$. The variance ${\ensuremath{\sigma}}_{C}^{2}$ of a suitably defined forward-backward asymmetry variable $C$ is calculated as a function of $\ensuremath{\eta},\ensuremath{\Delta}\ensuremath{\eta}$, and centrality. It is found to be sensitive to short-range correlations, and the concept of ``clustering'' is used to interpret comparisons to phenomenological models.

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What this paper is about

Forward-backward correlations of charged-particle multiplicities in symmetric bins in pseudorapidity are studied to gain insight into the underlying correlation structure of particle production in Au+Au collisions. The PHOBOS detector is used to measure integrated multiplicities in bins centered at \ensuremath{\eta}, defined within $|\ensuremath{\eta}|<3$, and covering intervals $\ensuremath{\Delta}\ensuremath{\eta}$. The variance ${\ensuremath{\sigma}}_{C}^{2}$ of a suitably defined forward-backward asymmetry variable $C$ is calculated as a function of $\ensuremath{\eta},\ensuremath{\Delta}\ensuremath{\eta}$, and centrality. It is found to be sensitive to short-range correlations, and the concept of ``clustering'' is used to interpret comparisons to phenomenological models.

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Available abstract

Forward-backward correlations of charged-particle multiplicities in symmetric bins in pseudorapidity are studied to gain insight into the underlying correlation structure of particle production in Au+Au collisions. The PHOBOS detector is used to measure integrated multiplicities in bins centered at \ensuremath{\eta}, defined within $|\ensuremath{\eta}|<3$, and covering intervals $\ensuremath{\Delta}\ensuremath{\eta}$. The variance ${\ensuremath{\sigma}}_{C}^{2}$ of a suitably defined forward-backward asymmetry variable $C$ is calculated as a function of $\ensuremath{\eta},\ensuremath{\Delta}\ensuremath{\eta}$, and centrality. It is found to be sensitive to short-range correlations, and the concept of ``clustering'' is used to interpret comparisons to phenomenological models.

Key concepts: Pseudorapidity, Physics, Multiplicity (mathematics), Combinatorics, Particle physics, Mathematics, Charged particle, Geometry

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