Longitudinal scaling property of the charge balance function in Au+Au collisions at sqrt sNN = 200 GeV

Journal Article · Fri May 28 04:00:00 EDT 2010 · Physics Letters, (Section) B

DOI:https://doi.org/10.1016/j.physletb.2010.05.028· OSTI ID:1040424

Abelev, B I; Dunlop, J

We present measurements of the charge balance function, from the charged particles, for diverse pseudorapidity and transverse momentum ranges in Au + Au collisions at {radical}s{sub NN} = 200 GeV using the STAR detector at RHIC. We observe that the balance function is boost-invariant within the pseudorapidity coverage [-1.3,1.3]. 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.

• Research Organization: Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040424
• Report Number(s): BNL--91419-2010-JA; KB0202012
• Journal Information: Physics Letters, (Section) B, Journal Name: Physics Letters, (Section) B Journal Issue: 3 Vol. 690; ISSN PYLBAJ; ISSN 0370-2693
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGED PARTICLES
Longitudinal scaling
PARTICLE RAPIDITY
SCALING
TRANSVERSE MOMENTUM
boost-invariance
charge balance function
nucleus-nucleus collisions
relativistic heavy ion collider