Forward Λ production and nuclear stopping power in d+Au collisions at sNN=200 GeV

B. I. Abelev et al. (STAR Collaboration)
Phys. Rev. C 76, 064904 – Published 18 December 2007

Abstract

We report the measurement of Λ and Λ¯ yields and inverse slope parameters in d+Au collisions at sNN=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 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 without a hadronic rescattering phase do not describe the measured particle yields, while models that include target remnants or hadronic rescattering do. The multichain model can provide a good description of the net baryon density in d+Au collisions at energies currently available at the BNL Relativistic Heavy Ion Collider, and the derived parameters of the model agree with those from nuclear collisions at lower energies.

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  • Received 4 June 2007

DOI:https://doi.org/10.1103/PhysRevC.76.064904

©2007 American Physical Society

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Vol. 76, Iss. 6 — December 2007

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