Abstract
The spectrum and nuclear modification factor () are reported for and from 0% to 60% central and collisions at at STAR. A significant suppression of -integrated production is observed in central events. The data are consistent with no suppression, although the precision is limited by the available statistics. in collisions exhibits a strong suppression at low transverse momentum and gradually increases with . The data are compared to high- STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.
7 More- Received 13 October 2013
- Revised 7 April 2014
DOI:https://doi.org/10.1103/PhysRevC.90.024906
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