Journal
PHYSICAL REVIEW C
Volume 81, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.81.024911
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Funding
- Offices of NP
- US DOE Office of Science
- US NSF
- Sloan Foundation
- DFG cluster of excellence 'Origin and Structure of the Universe'
- RA
- RPL
- EMN of France
- STFC
- EPSRC of the United Kingdom
- FAPESP of Brazil
- Russian Ministry of Sci. and Tech.
- NNSFC
- CAS
- MoST
- MoE of China
- IRP
- GA of the Czech Republic
- FOM of the Netherlands
- DAE
- DST
- CSIR of the Government of India
- Polish State Committee for Scientific Research
- Korea Sci. & Eng. Foundation
- Korea Research Foundation
- [CNRS/IN2P3]
- Science and Technology Facilities Council [PP/F001061/1] Funding Source: researchfish
- STFC [PP/F001061/1] Funding Source: UKRI
- Division Of Physics
- Direct For Mathematical & Physical Scien [0758018] Funding Source: National Science Foundation
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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 root s(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(T)>, particle ratios, elliptic flow, and Hanbury-Brown-Twiss (HBT) radii are consistent with the corresponding results at similar root s(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(T)>, and particle ratios are discussed. These results also demonstrate that the capabilities of the STAR detector, although optimized for root s(NN) = 200 GeV, are suitable for the proposed QCD critical-point search and exploration of the QCD phase diagram at RHIC.
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