arXiv subjects
Publications and source records attributed to Selemon Bekele.
After five years of running at RHIC, and on the eve of the LHC heavy-ion program, we highlight the status of femtoscopic measurements. We emphasize the role interferometry plays in addressing fundamental questions about the state of matter created in such collisions, and present an enumerated list of measurements, analyses and calculations that are needed to advance the field in the coming years.
Collisions between hadronic systems at relativistic energies provide a window on the small-x gluon distributions of fast moving nuclei. It has been predicted that gluon saturation effects will manifest themselves as a suppression in the transverse momentum (pT) distribution at a scale which is connected with the rapidity of the measured particles. Saturation effects are most evident at large (pseudo)-rapidity, i.e., at small angles relative to the beam direction. The dependence of the nuclear modification factor on the number of participants provides a constraint on the mechanism underlying the high-pT suppression. Here we present results for the nuclear modification factor Rcp at forward rapidity as a function of system mass comparing results from CuCu, AuAu and dAu collsions at 200 GeV/NN.