Eur. Phys. J. Special Topics 155, 89-99 (2008)
https://doi.org/10.1140/epjst/e2008-00592-3

Pion production in dAu collisions at RHIC energy

¹ RMKI Research Institute for Particle and Nuclear Physics, PO Box 49, 1525 Budapest, Hungary
² Department of Physics, Columbia University, 538 West 120th Street, New York, NY, 10027, USA
³ Department for Theoretical Physics, Eötvös University, Pázmány P. 1/A, 1117 Budapest, Hungary
⁴ Center for Nuclear Research, Department of Physics, Kent State University, Kent, OH, 44242, USA

Corresponding author: plevai@rmki.kfki.hu

Abstract

We present our results on neutral pion (π⁰) production in pp and dAu collisions at RHIC energy. Pion spectra are calculated in a next-to-leading order (NLO) perturbative QCD-based model. The model includes the transverse component of the initial parton distribution (“intrinsic k_T”). We compare our results to the available experimental data from RHIC, and fit the data with high precision. The calculation tuned this way is repeated for the dAu collision, and used to investigate the interplay of shadowing and multiple scattering at RHIC. The centrality dependence of the nuclear modification factor shows a measurable difference between different shadowing parameterizations.