Identified Baryon and Meson Distributions at Large Transverse Momenta from Au+Au Collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Fri Oct 13 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.152301· OSTI ID:20860949

Abelev, B I; Bielcik, J; Bielcikova, J; Caines, H; Catu, O; Chikanian, A; Du, F; Finch, E; Harris, J W; Heinz, M; Lamont, M A. C.; Lin, G; Majka, R; Nattrass, C; Salur, S; Sandweiss, J; Smirnov, N; Witt, R ^[1]; Aggarwal, M M; Bhati, A K ^[2]

---

1. Yale University, New Haven, Connecticut 06520 (United States)
2. Panjab University, Chandigarh 160014 (India)

Transverse momentum spectra of {pi}{sup {+-}}, p, and p up to 12 GeV/c at midrapidity in centrality selected Au+Au collisions at {radical}(s{sub NN})=200 GeV are presented. In central Au+Au collisions, both {pi}{sup {+-}} and p(p) show significant suppression with respect to binary scaling at p{sub T}(greater-or-similar sign)4 GeV/c. Protons and antiprotons are less suppressed than {pi}{sup {+-}}, in the range 1.5 < or approx. p{sub T} < or approx. 6 GeV/c. The {pi}{sup -}/{pi}{sup +} and p/p ratios show at most a weak p{sub T} dependence and no significant centrality dependence. The p/{pi} ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at p{sub T} > or approx. 5 GeV/c. The results at high p{sub T} indicate that the partonic sources of {pi}{sup {+-}}, p, and p have similar energy loss when traversing the nuclear medium.

• OSTI ID: 20860949
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
COLLIDING BEAMS
COLLISIONS
GEV RANGE 100-1000
GOLD 197 BEAMS
GOLD 197 REACTIONS
GOLD 197 TARGET
PARTICLE RAPIDITY
PIONS MINUS
PIONS PLUS
PROTONS
TRANSVERSE MOMENTUM