Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-12-22
Physics
Nuclear Physics
Nuclear Experiment
4 pages, Proceedings of Hard Probes 2010 Conference
Scientific paper
The physics of hadron-hadron collisions is very complex involving both perturbative and non-perturbative QCD. It is therefore imperative to study p-p collisions in as much detail as possible to provide a wide variety of data against which the various theoretical calculations can be tested. Direct jet measurements, for instance, help address fundamental questions of the fragmentation process. These measurements form a critical baseline for comparisons of results from heavy-ion studies, where modifications of the fragmentation functions are expected due to interactions of the high ${Q^2}$ scattered partons with the hot and dense medium. Finally, it is also important to gain a deeper understanding of how the beam-beam remnants, multi-parton interactions and initial- and final-state radiation combine to produce the particles observed in the underlying event. In this talk we present results on jet production and the underlying event in p-p collisions at 200 GeV collisions as measured by the STAR experiment at RHIC.
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