Cold nuclear matter physics at forward rapidities from d+Au collisions in PHENIX

Abstract

We present measurements by the PHENIX experiment at RHIC of di-hadron pair production in \dAu collisions where the particles in the pair are varied across a wide range of pseudorapidity, out to $\eta =3.8$. With di-hadrons, varying the $p_T$ and rapidity of the particles in the di-hadron pair allows studying any effects as a function of partonic $x$ in the nucleus. These di-hadron measurements might probe down to parton momentum fractions x $\sim$ $10^{-3}$ in the gold nucleus, where the interesting possibility of observing gluon saturation effects at RHIC is the greatest. Our measurements show that the correlated yield of back-to-back pairs in \dAu collisions is suppressed by up to an order of magnitude relative to \pp collisions, and increases with greater nuclear path thickness and with a selection for lower x in the Au nucleus.

To appear in the proceedings of Quark Matter 2011 (QM 2011), Annecy, France, 23-28 May 2011

References in corpus (6)

• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Forward Neutral Pion Production in p+p and d+Au Collisions at sqrt(s_NN)=200 GeV
• Non-Abelian energy loss in cold nuclear matter
• Multiple parton interactions and forward double pion production in pp and dA scattering
• Energy losses in the black disc regime and correlation effects in the STAR forward pion production in dAu collisions
• Azimuthal Angle Correlations for Rapidity Separated Hadron Pairs in d+Au Collisions at sqrt(s_NN) = 200 GeV

Cited by in corpus (1)

• Description of di-hadron saturation signals within a universal nuclear parton distribution function approach