Köln 2004 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 7: Heavy Ions I
HK 7.3: Talk
Monday, March 8, 2004, 16:45–17:00, F
Lambda production at high rapidity in d+Au and p+p collisions at √SNN = 200 GeV — •Frank Simon — Max–Planck–Institut für Physik, München, Germany
We present first studies of Lambda and Anti-Lambda production in the pseudorapidity region 2.5 < |η| < 4, covered by the forward radial-drift TPCs (FTPCs) at STAR. The FTPCs provide momentum and charge determination but no particle identification, making the use of combinatorial methods and background subtraction necessary for Lambda identification.
The Anti-Lambda/Lambda ratio measured at high rapidity will be compared to the ratio obtained at mid-rapidity with the STAR TPC. Differences in the ratio for different collision systems and a possible asymmetry in d+Au collisions will give indications of what mechanisms drive the antibaryon to baryon ratio at high rapidities.