Centrality Dependence of π0 and η Production at Large Transverse Momentum in sNN=200GeV d+Au Collisions
Abstract
The dependence of transverse momentum spectra of neutral pions and η mesons with pT<16GeV/c and pT<12GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d+Au collisions at sNN=200GeV. The measured yields are compared to those in p+p collisions at the same sNN scaled by the number of underlying nucleon-nucleon collisions in d+Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central Au+Au collisions at RHIC. Only a weak pT and centrality dependence can be observed.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2007
- DOI:
- 10.1103/PhysRevLett.98.172302
- arXiv:
- arXiv:nucl-ex/0610036
- Bibcode:
- 2007PhRvL..98q2302A
- Keywords:
-
- 25.75.Dw;
- Particle and resonance production;
- Nuclear Experiment
- E-Print:
- 332 authors, 6 pages text, 2 figures, one table. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html