Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at {radical}{ovr}{sub NN} = 9.2 GeV.
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 {radical}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 {radical}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 {radical}s{sub NN} = 200 GeV, are suitable for the proposed QCD critical-point search and exploration of the QCD phase diagram at RHIC.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); Sloan Foundation; ESPRC - United Kingdom
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 1050166
- Report Number(s):
- ANL-HEP-PR-10-33; PRVCAN; TRN: US1204546
- Journal Information:
- Physical Review, C (Nuclear Physics), Vol. 81, Issue 2; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- ENGLISH
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