Abstract
Neutral pion transverse momentum spectra were measured in and collisions at at midrapidity () over the range . The spectra are compared to spectra measured in collisions at in the same experiment. For a wide range of centralities (), the yield of ’s with is larger than or consistent with the or yields scaled with the number of nucleon-nucleon collisions (), while for central collisions with , the yield is suppressed.
- Received 21 August 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.242301
©2008 American Physical Society