Identified hadron compositions in p+p and Au+Au collisions at high transverse momenta at âS(NN)=200 GeV.
Phys Rev Lett
; 108(7): 072302, 2012 Feb 17.
Article
en En
| MEDLINE
| ID: mdl-22401197
We report transverse momentum (p(T)≤15 GeV/c) spectra of π(±), K(±), p, p[over ¯], K(S)(0), and ρ(0) at midrapidity in p+p and Au+Au collisions at âS(NN)=200 GeV. Perturbative QCD calculations are consistent with π(±) spectra in p+p collisions but do not reproduce K and p(p[over ¯]) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p(T) provide experimental evidence for varying quark and gluon jet contributions to high-p(T) hadron yields. The relative hadron abundances in Au+Au at p(T)â³8 GeV/c are measured to be similar to the p+p results, despite the expected Casimir effect for parton energy loss.
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2012
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Estados Unidos