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arXiv 0705.2511nucl-ex
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在sqrts = 200 GeV时Au+Au碰撞中奇异重子产生的增强

Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV

STAR Collaboration, B. I. Abelev

摘要:

我们报告的奇异和多奇异重子的生产率在金+金碰撞sqrts = 200 GeV相比,PP相互作用在相同的能量观察到的差异。在Au+Au碰撞的奇怪的重子产量,然后按比例缩小的参与核子的数量,增强相对于PP反应中测量。观察到的增强与重子的奇异含量增加,并增加所有奇怪的重子与碰撞中心。的增强是定性类似于在较低的碰撞能量sqrts =17.3 GeV观察到的。先前的观测是针对体产生的,而在中等pT,1 < pT<4GeV/c,奇异重子的产额甚至超过了从pp产额的二进制标度。

英文摘要:

We report on the observed differences in production rates of strange and multi-strange baryons in Au+Au collisions at sqrts = 200 GeV compared to pp interactions at the same energy. The strange baryon yields in Au+Au collisions, then scaled down by the number of participating nucleons, are enhanced relative to those measured in pp reactions. The enhancement observed increases with the strangeness content of the baryon, and increases for all strange baryons with collision centrality. The enhancement is qualitatively similar to that observed at lower collision energy sqrts =17.3 GeV. The previous observations are for the bulk production, while at intermediate pT, 1 < pT< 4 GeV/c, the strange baryons even exceed binary scaling from pp yields.

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