Centrality Dependence of Charged-Hadron Transverse-Momentum Spectra in d+Au Collisions at (sNN)=200 GeV
Abstract
We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at (sNN)=200 GeV. The spectra were obtained for transverse momenta 0.25<pT<6.0 GeV/c, in a pseudorapidity range of 0.2<η<1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p+p¯ collisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au+Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-pT hadrons observed in Au+Au collisions.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 2003
- DOI:
- 10.1103/PhysRevLett.91.072302
- arXiv:
- arXiv:nucl-ex/0306025
- Bibcode:
- 2003PhRvL..91g2302B
- Keywords:
-
- 25.75.Dw;
- 25.75.Gz;
- Particle and resonance production;
- Particle correlations;
- Nuclear Experiment
- E-Print:
- 5 pages, 4 figures, submitted to PRL