Forward Lambda Production and Nuclear Stopping Power in D+Au Collisions at Root S(Nn)=200 Gev

نویسندگان

  • B. I. Abelev
  • Quan Li
  • M. M. Aggarwal
چکیده

We report the measurement of and ¯ yields and inverse slope parameters in d+Au collisions at √ 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 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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تاریخ انتشار 2013