Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at sq root(s{sub NN})=9.2 GeV

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024911· OSTI ID:21386628

Abelev, B I; Barannikova, O; Betts, R R; Garcia-Solis, E J; Hofman, D J; Hollis, R S; Iordanova, A; Kauder, K; Suarez, M C ^[1]; Aggarwal, M M; Bhati, A K; Kumar, L; Pruthi, N K ^[2]; Ahammed, Z; Chattopadhyay, S; Mazumdar, M R. Dutta; Ganti, M S; Ghosh, P; Mohanty, B; Nayak, T K ^[3]

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1. University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
2. Panjab University, Chandigarh 160014 (India)
3. Variable Energy Cyclotron Centre, Kolkata 700064 (India)

We present the first measurements of identified hadron production, azimuthal anisotropy, and pion interferometry from Au+Au collisions below the nominal injection energy at the BNL Relativistic Heavy-Ion Collider (RHIC) facility. The data were collected using the large acceptance solenoidal tracker at RHIC (STAR) detector at sq root(s{sub NN})=9.2 GeV from a test run of the collider in the year 2008. Midrapidity results on multiplicity density dN/dy in rapidity y, average transverse momentum <p{sub T}>, particle ratios, elliptic flow, and Hanbury-Brown-Twiss (HBT) radii are consistent with the corresponding results at similar sq root(s{sub NN}) from fixed-target experiments. Directed flow measurements are presented for both midrapidity and forward-rapidity regions. Furthermore the collision centrality dependence of identified particle dN/dy, <p{sub T}>, and particle ratios are discussed. These results also demonstrate that the capabilities of the STAR detector, although optimized for sq root(s{sub NN})=200 GeV, are suitable for the proposed QCD critical-point search and exploration of the QCD phase diagram at RHIC.

• OSTI ID: 21386628
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024911; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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BROOKHAVEN RHIC
COLLISIONS
DENSITY
EXPLORATION
GEV RANGE 01-10
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MULTIPLICITY
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HADRONS
HEAVY ION ACCELERATORS
INFORMATION
LINEAR MOMENTUM
MESONS
METALS
NATIONAL ORGANIZATIONS
PHYSICAL PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
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