Direct hadron production in hadronic collisions

✍ Scribed by François Arleo; Stanley J. Brodsky; Dae Sung Hwang; Anne M. Sickles

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 238 KB
• Volume: 207-208
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2010.10.021

✦ Synopsis

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.