Cluster properties from two-particle angular correlations in p+p collisions at s=200 and 410 GeV

B. Alver, B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, R. R. Betts, R. Bindel, W. Busza, Z. Chai, V. Chetluru, E. García, T. Gburek, K. Gulbrandsen, J. Hamblen, I. Harnarine, C. Henderson, D. J. Hofman, R. S. Hollis, R. Hołyński, B. HolzmanA. Iordanova, J. L. Kane, P. Kulinich, C. M. Kuo, W. Li, W. T. Lin, C. Lozides, S. Manly, A. C. Mignerey, R. Nouicer, A. Olszewski, R. Pak, C. Reed, E. Richardson, C. Roland, G. Roland, J. Sagerer, I. Sedykh, C. E. Smith, M. A. Stankiewicz, P. Steinberg, G. S.F. Stephens, A. Sukhanov, A. Szopstak, M. B. Tonjes, A. Trzupek, G. J.Van Nieuwenhuizen, S. S. Vaurynovich, R. Verier, G. I. Veres, P. Walters, E. Wenger, D. Willhelm, F. L.H. Wolfs, B. Wosiek, K. Woźniak, S. Wyngaardt, B. Wysłouch

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Abstract

We present results on two-particle angular correlations in proton-proton collisions at center-of-mass energies of 200 and 410 GeV. The PHOBOS experiment at the BNL Relativistic Heavy Ion Collider has a uniquely large coverage for charged particles, giving the opportunity to explore the correlations at both short- and long-range scales. At both energies, a complex two-dimensional correlation structure in Δη and Δ is observed. In the context of an independent cluster model of short-range correlations, the cluster size and its decay width are extracted from the two-particle pseudorapidity correlation function and compared with previous measurements in proton-proton and proton-antiproton collisions, as well as PYTHIA and HIJING predictions.

Original languageEnglish
Article number054913
JournalPhysical Review C - Nuclear Physics
Volume75
Issue number5
DOIs
StatePublished - 29 May 2007

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