HAL : in2p3-00023360, version 1
 arXiv : nucl-ex/0411003
 Physical Review C 73 (2006) 064907
 Minijet deformation and charge-independent two-particle correlations on momentum subspace ($\eta, \phi$) in Au-Au collisions at $\sqrt{s_{NN}}$ = 130 GeV
 STAR Collaboration(s)
 (2006)
 We present first measurements of charge-independent correlations on momentum-space difference variables $\eta_1 - \eta_2$ (pseudorapidity) and $\phi_1 - \phi_2$ (azimuth) for charged primary hadrons with transverse momentum within $0.15 \leq p_t \leq 2$ GeV/$c$ and $|\eta| \leq 1.3$ from Au-Au collisions at $\sqrt{s_{NN}} = 130$ GeV. We observe strong charge-indepedendent correlations associated with minijets and elliptic flow. The width of the minijet peak on $\eta_1 - \eta_2$ increases by a factor 2.3 from peripheral to central collisions, suggesting strong coupling of partons to a longitudinally-expanding colored medium. New methods of jet analysis introduced here reveal nonperturbative medium effects in heavy ion collisions.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/nucl-ex/0411003
 in2p3-00023360, version 1 http://hal.in2p3.fr/in2p3-00023360 oai:hal.in2p3.fr:in2p3-00023360 Contributeur : Yvette Heyd <> Soumis le : Lundi 29 Novembre 2004, 09:12:50 Dernière modification le : Mardi 4 Décembre 2007, 11:52:50