Higher-twist contributions to large p? hadron production in hadronic collisions

François Arleo, Stanley J. Brodsky, Dae Sung Hwang, Anne M. Sickles

Research output: Contribution to conferencePaperpeer-review


The scaling behavior of large-p? hadron production in hadronic collisions is investigated. A significant deviation from the NLO QCD predictions is reported, especially at high values of x? = 2p?/vs. In contrast, the prompt photon and jet production data prove in agreement with leading-twist expectations. These results are interpreted as coming from a non-negligible contribution of higher-twist processes, where the hadron is produced directly in the hard subprocess. Predictions for scaling exponents at RHIC are successfully compared to PHENIX preliminary measurements. We suggest to trigger on isolated large-p? hadron production to enhance higher-twist processes, and point that the use of isolated hadrons as a signal for new physics at colliders can be affected by the presence of direct hadron production processes.

Original languageEnglish (US)
Number of pages4
StatePublished - 2010
Externally publishedYes
Event45th Rencontres de Moriond on QCD and High Energy Interactions 2010 - La Thuile, Italy
Duration: Mar 13 2010Mar 20 2010


Conference45th Rencontres de Moriond on QCD and High Energy Interactions 2010
CityLa Thuile

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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