1. Direct hadron production in hadronic collisions
- Author
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Arleo, François, Brodsky, Stanley J., Hwang, Dae Sung, and Sickles, Anne M.
- Subjects
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COLLISIONS (Nuclear physics) , *HADRONS , *SCALING laws (Nuclear physics) , *NUCLEAR cross sections , *QUANTUM chromodynamics , *PREDICTION models , *JETS (Nuclear physics) , *LARGE Hadron Collider - Abstract
The scaling behavior of the invariant production cross section is a powerful tool in order to probe the dynamics of particle production. Here, we investigate the scaling properties of large-p ⊥ hadron, jet and prompt photon production in hadronic collisions by comparing systematically world data to NLO QCD predictions. In the hadron sector a significant discrepancy is reported, while prompt photon and jet production data prove in agreement with leadingtwist expectations. We interpret these results as coming from a non-negligible contribution of higher-twist processes, in which the hadron is produced directly in the hard subprocess. Predictions at RHIC are successfully compared to PHENIX preliminary measurements and LHC predictions are given. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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