Large-scale two-particle correlation sructures in Au-Au collisions at center of mass energy = 130 GeV
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The first measurement of surviving correlation structure in the final-state charged hadron distribution produced in the collisions of gold nuclei at √ sNN = 130 GeV is presented. We observe an abundance of correlation structures reflecting dynamics of relativistic heavy ion collisions over a large momentum acceptance, transverse momentum range 0.15 ≤ pt ≤ 2.0 GeV/c, pseudorapidity range −1.3 ≤ η ≤ 1.3 and full azimuth angle −π ≤ φ ≤ π among primary hadrons measured by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). Correlation structures are measured by means of two-particle number-density ratios in transverse and axial momentum spaces. Isoscalar and isovector correlations are studied separately by examining pair-charge dependent (CD) and independent (CI) correlation components. Observed correlation structures are consistent with the picture that particle production from colorstring fragmentation and fragmentation of partons from initial state parton scattering in p-p collisions is strongly modified by a dissipative color medium created in central heavy ion collisions.