Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-01-27
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings for the VI Workshop on Particle Correlations and Femtoscopy 2010. Kiev, Ukraine September 14-18, 2010
Scientific paper
Two particle correlations are used to extract information about the characteristic size of the system in proton-proton and heavy ion collisions. The size of the system can be extracted from the Bose-Einstein quantum mechanical effect for identical particles. However there are also long range correlations that shift the baseline of the correlation function from the expected flat behavior. A possible source of these correlations is the conservation of energy and momentum, especially for small systems, where the energy available for particle production is limited. A new technique, first used by the STAR collaboration, of quantifying these long range correlations using energy-momentum conservation considerations is presented in this talk. Using Monte Carlo simulations of proton-proton collisions at 900 GeV, it is shown that the baseline of the two particle correlation function can be described using this technique.
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