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20 April 2024

» pubmed » pmid11531474

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Ratios of charged antiparticles-to-particles near mid-rapidity in Au + Au collisions at sqrt[s(NN)]=130 GeV
B B Back ; M D Baker ; D S Barton ; R R Betts ; R Bindel ; A Budzanowski ; W Busza ; A Carroll ; M P Decowski ; E Garcia ; N George ; K Gulbrandsen ; S Gushue ; C Halliwell ; G A Heintzelman ; C Henderson ; R Ho?y?ski ; D Hofman ; B Holzman ; E Johnson ; J Kane ; J Katzy ; N Khan ; W Kucewicz ; P Kulinich ; W T Lin ; S Manly ; D McLeod ; J Micha?owski ; A Mignerey ; J Mülmenstädt ; R Nouicer ; A Olszewski ; R Pak ; I C Park ; H Pernegger ; C Reed ; L P Remsberg ; M Reuter ; C Rol ; G Rol ; L Rosenberg ; P Sarin ; P Sawicki ; W Skulski ; S G Steadman ; G S Stephans ; P Steinberg ; M Stodulski ; A Sukhanov ; J L Tang ; R Teng ; A Trzupek ; C Vale ; G J van Nieuwenhuizen ; R Verdier ; B Wadsworth ; F L Wolfs ; B Wosiek ; K Wo?niak ; A H Wuosmaa ; B Wys?ouch ; ;
Date:	3 Sep 2001
Journal:	Phys Rev Lett, 87 (10), 102301
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 sqrt[s(NN)] = 130 GeV. We observe <pi(-)>/<pi(+)> = 1.00+/-0.01(stat)+/-0.02(syst), <K->/<K+> = 0.91+/-0.07(stat)+/-0.06(syst), and <p>/<p> = 0.60+/-0.04(stat)+/-0.06(syst). The <K->/<K+> and <p>/<p> 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 sqrt[s(NN)] = 17.2 GeV.
Source:	PubMed, pmid11531474
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