Rapidity dependence of deuteron production in Au Au collisions at $sqrt{s {NN}}$ = 200 GeV - Nuclear ExperimentReportar como inadecuado




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Abstract: We have measured the distributions of protons and deuterons produced in highenergy heavy ion Au+Au collisions at RHIC over a very wide range of transverseand longitudinal momentum. Near mid-rapidity we have also measured thedistribution of anti-protons and anti-deuterons. We present our results in thecontext of coalescence models. In particular we extract the -volume ofhomogeneity- and the average phase-space density for protons and anti-protons.Near central rapidity the coalescence parameter $B 2p T$ and the spaceaveraged phase-space density $ p T$ are very similar for both protons andanti-protons. For protons we see little variation of either $B 2p T$ or thespace averaged phase-space density as the rapidity increases from 0 to 3.However both these quantities depend strongly on $p T$ at all rapidities. Theseresults are in contrast to lower energy data where the proton and anti-protonphase-space densities are different at $y$=0 and both $B 2$ and $f$ dependstrongly on rapidity.



Autor: BRAHMS Collaboration: I. Arsene, I. G. Bearden, D. Beavis, S. Bekele, C. Besliu, B. Budick, H. Bøggild, C. Chasman, C. H. Christ

Fuente: https://arxiv.org/







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