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

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

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 conference › Paper › peer-review

Abstract

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 language	English (US)
Pages	131-134
Number of pages	4
State	Published - 2010
Externally published	Yes
Event	45th Rencontres de Moriond on QCD and High Energy Interactions 2010 - La Thuile, Italy Duration: Mar 13 2010 → Mar 20 2010

Conference

Conference	45th Rencontres de Moriond on QCD and High Energy Interactions 2010
Country/Territory	Italy
City	La Thuile
Period	3/13/10 → 3/20/10

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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Cite this

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title = "Higher-twist contributions to large p? hadron production in hadronic collisions",

abstract = "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.",

author = "Fran{\c c}ois Arleo and Brodsky, {Stanley J.} and Hwang, {Dae Sung} and Sickles, {Anne M.}",

note = "Publisher Copyright: {\textcopyright} Th{\^e} Gioi Publishers, 2010.; 45th Rencontres de Moriond on QCD and High Energy Interactions 2010 ; Conference date: 13-03-2010 Through 20-03-2010",

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language = "English (US)",

pages = "131--134",

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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.

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.

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T2 - 45th Rencontres de Moriond on QCD and High Energy Interactions 2010

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