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Studies of higher twist and higher order effects in NLO and NNLO QCD analysis of lepton-nucleon scattering data on \(F_2\) and \(R ={\sigma_L}/{\sigma_T}\)

  • U.K. Yang
  • A. Bodek
Experimental physics

Abstract.

We report on the extraction of the higher twist contributions to \(F_2\) and \(R ={\sigma_L}/{\sigma_T}\) from global NLO and NNLO QCD fits to lepton nucleon scattering data over a wide range of \(Q^2\). The NLO fits require both target mass and higher twist contributions at low \(Q^2\). However, in the NNLO analysis, the data are described by the NNLO QCD predictions (with target mass corrections) without the need for any significant contributions from higher twist effects. An estimate of the difference between NLO and NNLO parton distribution functions is obtained.

Keywords

Significant Contribution Order Effect Parton Distribution Parton Distribution Function Mass Correction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • U.K. Yang
    • 1
  • A. Bodek
    • 1
  1. 1.Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USAUS

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