Azimuthal Angle Correlations for Rapidity Separated Hadron Pairs in d + Au Collisions at √sNN = 200 GeV

PHENIX Collaboration

Hachiya Takashi

Homma Kensuke

Kohara Ryota

Nakamura Tomoaki

Shigaki Kenta

Sugitate Toru

Tsuchimoto Yuji

Physical Review Letters

Deuteron-gold (d + Au) collisions at the Relativistic Heavy Ion Collider provide ideal platforms for testing QCD theories in dense nuclear matter at high energy. In particular, models suggesting strong saturation effects for partons carrying small nucleon momentum fraction (x) predict modifications to jet production at forward rapidity (deuteron-going direction) in d + Au collisions. We report on two-particle azimuthal angle correlations between charged hadrons at forward/backward (deuteron/gold going direction) rapidity and charged hadrons at midrapidity in d + Au and p + p collisions at √sNN = 200GeV. Jet structures observed in the correlations are quantified in terms of the conditional yield and angular width of away-side partners. The kinematic region studied here samples partons in the gold nucleus with x∼0.1 to ∼0.01. Within this range, we find no x dependence of the jet structure in d + Au collisions.

eng

American Physical Society

Copyright (c) 2006 The American Physical Society.

[ISSN] 0031-9007

[DOI] 10.1103/PhysRevLett.96.222301

[NCID] AA00773679

[DOI] http://dx.doi.org/10.1103/PhysRevLett.96.222301