Rapidity dependence of charged antihadron to hadron ratios in Au+Au collisions at sqrt[s(NN)]=200 GeV

I G Bearden; D Beavis; C Besliu; Y Blyakhman; B Budick; H Bøggild; C Chasman; C H Christensen; P Christiansen; J Cibor; R Debbe; E Enger; J J Gaardhøje; M Germinario; K Hagel; O Hansen; A Holm; A K Holme; H Ito; E Jakobsen; A Jipa; F Jundt; J I Jørdre; C E Jørgensen; R Karabowicz; T Keutgen; E J Kim; T Kozik; T M Larsen; J H Lee; Y K Lee; G Løvhøiden; Z Majka; A Makeev; B McBreen; M Mikelsen; M Murray; J Natowitz; B S Nielsen; J Norris; K Olchanski; J Olness; D Ouerdane; R Płaneta; F Rami; C Ristea; D Röhrich; B H Samset; D Sandberg; S J Sanders; R A Scheetz; P Staszel; T S Tveter; F Videbaek; R Wada; A Wieloch; Z Yin; I S Zgura; BRAHMS Collaboration

doi:10.1103/PhysRevLett.90.102301

Rapidity dependence of charged antihadron to hadron ratios in Au+Au collisions at sqrt[s(NN)]=200 GeV

Phys Rev Lett. 2003 Mar 14;90(10):102301. doi: 10.1103/PhysRevLett.90.102301. Epub 2003 Mar 12.

Affiliation

¹ Niels Bohr Institute, Blegdamsvej 17, University of Copenhagen, Copenhagen 2100, Denmark.

PMID: 12688991
DOI: 10.1103/PhysRevLett.90.102301

Abstract

We present ratios of the numbers of charged antihadrons to hadrons (pions, kaons, and protons) in Au+Au collisions at sqrt[s(NN)]=200 GeV as a function of rapidity in the range y=0-3. While the ratios at midrapidity are approaching unity, the K(-)/K(+) and p;/p ratios decrease significantly at forward rapidities. An interpretation of the results within the statistical model indicates a reduction of the baryon chemical potential from mu(B) approximately 130 MeV at y=3 to mu(B) approximately 25 MeV at y=0.