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Ratios of charged antiparticles-to-particles near mid-rapidity in Au + Au collisions at sqrt[s(NN)]=130 GeV |
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| Authors: | Back B B Baker M D Barton D S Betts R R Bindel R Budzanowski A Busza W Carroll A Decowski M P Garcia E George N Gulbrandsen K Gushue S Halliwell C Heintzelman G A Henderson C Ho?yński R Hofman D Holzman B Johnson E Kane J Katzy J Khan N Kucewicz W Kulinich P Lin W T Manly S McLeod D Micha?owski J Mignerey A Mülmenstädt J Nouicer R Olszewski A Pak R Park I C Pernegger H Reed C Remsberg L P Reuter M Roland C Roland G Rosenberg L Sarin P Sawicki P Skulski W Steadman S G Stephans G S Steinberg P Stodulski M Sukhanov A Tang J L Teng R Trzupek A Vale C van Nieuwenhuizen G J Verdier R Wadsworth B |
| Institution: | Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA. |
| Abstract: | We have measured the ratios of antiparticles to particles for charged pions, kaons, and protons near mid-rapidity in central Au+Au collisions at sqrts(NN)] = 130 GeV. We observe / = 0.60+/-0.04(stat)+/-0.06(syst). The / ratios give a consistent estimate of the baryo-chemical potential mu(B) of 45 MeV, a factor of 5-6 smaller than in central Pb+Pb collisions at sqrts(NN)] = 17.2 GeV. |
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