Baryon and antibaryon production in lead-lead collisions at 158AGeV/c

G Ambrosini,R Arsenescu,C Baglin,J Beringer,Christian Bohm,K Borer, A Bussiere,F Dittus, K Elsener,D Frei,Ph Gorodetzky,J P Guillaud,P O Hess,E Hugentobler,S Kabana,Reiner Klingenberg,Tomas Linden,K D Lohmann,R K Mommsen,U Moser,T Pal,K Pretzl, J Schacher,B Sellden, F Stoffel, J Tuominiemi,Michele Weber,Q P Zhang

PHYSICS LETTERS B（1998）

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摘要

We report on baryon and antibaryon as well as K+ and K- production cross sections measured in lead-lead collisions at 158 GeV/c per nucleon, The presented data were taken at zero degree production angle with a minimum bias trigger. The measurements covered a wide range of rapidity 1.4 < y < 6.0, Using a simple thermodynamical and a coalescence model the temperature and the chemical potential of the particle source as well as the freeze-out radius of baryons and antibaryons have been deduced. (C) 1998 Elsevier Science B.V.

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