Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-06-04
Phys.Rev.C76:064904,2007
Physics
Nuclear Physics
Nuclear Experiment
11 pages, 7 figures, 3 tables, published in Physical Review C, v2: updated text and figures
Scientific paper
10.1103/PhysRevC.76.064904
We report the measurement of Lamda and Anti-Lamda yields and inverse slope parameters in d + Au collisions at sqrt(s_NN) = 200 GeV at forward and backward rapidities (y = +- 2.75), using data from the STAR forward time projection chambers. The contributions of different processes to baryon transport and particle production are probed exploiting the inherent asymmetry of the d + Au system. Comparisons to model calculations show that the baryon transport on the deuteron side is consistent with multiple collisions of the deuteron nucleons with gold participants. On the gold side HIJING based models do not describe the measured particle yields while models with initial state nuclear effects and/or hadronic rescattering do. The multichain model can provide a good description of the net baryon density in d + Au collisions at energies available at the BNL Relativistic Heavy Ion Collider, and the derived parameters of the model agree with those from nuclear collisions at lower energies.
Abelev Betty I.
STAR Collaboration
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