TY - CONF
T1 - Higher-twist contributions to large p? hadron production in hadronic collisions
AU - Arleo, François
AU - Brodsky, Stanley J.
AU - Hwang, Dae Sung
AU - Sickles, Anne M.
N1 - Funding Information:
We thank A. Bazilevsky for providing us with Fig. ??. FA thanks CERN-TH for hospitality. SJB was supported by the Department of Energy under contract DE-AC02-76SF00515. DSH was supported by the International Cooperation Program of the KICOS and the Korea Research Foundation Grant (KRF-2008-313-C00166). AMS was supported by the Department of Energy under contract DE-AC02-98CH10886.
Publisher Copyright:
© Thê Gioi Publishers, 2010.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85090396284&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85090396284&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85090396284
SP - 131
EP - 134
T2 - 45th Rencontres de Moriond on QCD and High Energy Interactions 2010
Y2 - 13 March 2010 through 20 March 2010
ER -