Three-Particle Coincidence of the Long Range Pseudorapidity Correlation in High Energy Nucleus-Nucleus Collisions

B. I. Abelev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, B. D. Anderson, D. Arkhipkin, G. S. Averichev, J. Balewski, O. Barannikova, L. S. Barnby, S. Baumgart, D. R. Beavis (+373 others)
2010 Physical Review Letters  
We report the first three-particle coincidence measurement in pseudorapidity (Δη) between a high transverse momentum (p_) trigger particle and two lower p_ associated particles within azimuth |Δϕ|<0.7 in √( s_NN) = 200 GeV d+Au and Au+Au collisions. Charge ordering properties are exploited to separate the jet-like component and the ridge (long-range Δη correlation). The results indicate that the particles from the ridge are uncorrelated in Δη not only with the trigger particle but also between
more » ... hemselves event-by-event. In addition, the production of the ridge appears to be uncorrelated to the presence of the narrow jet-like component.
doi:10.1103/physrevlett.105.022301 pmid:20867701 fatcat:3i6qm2idjjak5g2mlmk6mx6a6a