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$Λ$ Production at High Rapidity in d+Au Collisions at $\sqrt{s_{NN}} = 200$ GeV

Frank Simon
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Abstract

We present first preliminary studies of $Λ$ and $\barΛ$ production in the pseudorapidity region $2.5 < |η| < 4$, covered by the forward radial-drift TPCs (FTPCs) in STAR. The FTPCs provide momentum and charge determination but no particle identification, making the use of combinatorial methods and background subtraction necessary for $Λ$ identification. The $\barΛ/Λ$ ratio measured at high rapidity is compared to the ratio obtained at mid-rapidity with the STAR TPC. Differences in the ratio at positive and negative rapidity point to an asymmetry in particle and antiparticle production in d+Au collisions.

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Frank Simon. 2004-03-12. $Λ$ Production at High Rapidity in d+Au Collisions at $\sqrt{s_{NN}} = 200$ GeV. https://arxiv.org/abs/nucl-ex/0403017

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