Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

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A scaling law analysis of the world data on inclusive large-p{sub {perpendicular}} hadron production in hadronic collisions is carried out. A significant deviation from leading-twist perturbative QCD predictions at next-to-leading order is reported. The observed discrepancy is largest at high values of x{sub {perpendicular}} = 2p{sub {perpendicular}}/{radical}s. In contrast, the production of prompt photons and jets exhibits the scaling behavior which is close to the conformal limit, in agreement with the leading-twist expectation. These results bring evidence for a non-negligible contribution of higher-twist processes in large-p{sub {perpendicular}} hadron production in hadronic collisions, where the hadron is produced directly in the ... continued below

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4 pages

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Arleo, Francois; Brodsky, Stanley J.; Hwang, Dae Sung & Sickles, Anne M. December 17, 2009.

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A scaling law analysis of the world data on inclusive large-p{sub {perpendicular}} hadron production in hadronic collisions is carried out. A significant deviation from leading-twist perturbative QCD predictions at next-to-leading order is reported. The observed discrepancy is largest at high values of x{sub {perpendicular}} = 2p{sub {perpendicular}}/{radical}s. In contrast, the production of prompt photons and jets exhibits the scaling behavior which is close to the conformal limit, in agreement with the leading-twist expectation. These results bring evidence for a non-negligible contribution of higher-twist processes in large-p{sub {perpendicular}} hadron production in hadronic collisions, where the hadron is produced directly in the hard subprocess rather than by gluon or quark jet fragmentation. Predictions for scaling exponents at RHIC and LHC are given, and it is suggested to trigger the isolated large-p{sub {perpendicular}} hadron production to enhance higher-twist processes.

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4 pages

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  • Journal Name: Submitted to Physical Review Letters

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  • Report No.: SLAC-PUB-13839
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 969228
  • Archival Resource Key: ark:/67531/metadc929877

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 17, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • July 25, 2017, 1:52 p.m.

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Arleo, Francois; Brodsky, Stanley J.; Hwang, Dae Sung & Sickles, Anne M. Higher-Twist Dynamics in Large Transverse Momentum Hadron Production, article, December 17, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc929877/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.