Longitudinal scaling property of the charge balance function in Au plus Au collisions at root s(NN)=200 GeV

0348022 - ÚJF 2011 RIV NL eng J - Journal Article
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Longitudinal scaling property of the charge balance function in Au plus Au collisions at root s(NN)=200 GeV.
Physics Letters. B. Roč. 690, č. 3 (2010), s. 239-244. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA ČR GA202/07/0079; GA MŠMT LA09013
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100502
Keywords : Longitudinal scaling * Charge balance function * Boost-invariance
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 5.255, year: 2010

We present measurements of the charge balance function, from the charged particles, for diverse pseudorapidity and transverse momentum ranges in Au + Au collisions at root S-NN = 200 GeV using the STAR detector at RHIC. We observe that the balance function is boost-invariant within the pseudorapidity coverage vertical bar-1.3, 1.3 vertical bar. The balance function properly scaled by the width of the observed pseudorapidity window does not depend on the position or size of the pseudorapidity window. This scaling property also holds for particles in different transverse momentum ranges. In addition, we find that the width of the balance function decreases monotonically with increasing transverse momentum for all centrality classes.
Permanent Link: http://hdl.handle.net/11104/0188647