Implications of CTEQ global analysis for collider observables

Pavel M. Nadolsky, Hung-Liang Lai, Qing-Hong Cao, Joey Huston, Jon Pumplin, Daniel Stump, Wu-Ki Tung, and C.-P. Yuan
Phys. Rev. D 78, 013004 – Published 21 July 2008

Abstract

The latest CTEQ6.6 parton distributions, obtained by global analysis of hard-scattering data in the framework of general-mass perturbative QCD, are employed to study theoretical predictions and their uncertainties for significant processes at the Fermilab Tevatron and CERN Large Hadron Collider. The previously observed increase in predicted cross sections for the standard-candle W and Z boson production processes in the general-mass scheme (compared to those in the zero-mass scheme) is further investigated and quantified. A novel method to constrain parton distribution function (PDF) uncertainties in LHC observables, by effectively exploiting PDF-induced correlations with benchmark standard model cross sections, is presented. Using this method, we show that the tt¯ cross section can potentially serve as a standard-candle observable for the LHC processes dominated by initial-state gluon scattering. Among other benefits, precise measurements of tt¯ cross sections would reduce PDF uncertainties in predictions for single top-quark and Higgs boson production in the standard model and minimal supersymmetric standard model.

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  • Received 18 March 2008

DOI:https://doi.org/10.1103/PhysRevD.78.013004

©2008 American Physical Society

Authors & Affiliations

Pavel M. Nadolsky1, Hung-Liang Lai2,3, Qing-Hong Cao4, Joey Huston1, Jon Pumplin1, Daniel Stump1, Wu-Ki Tung1,3, and C.-P. Yuan1

  • 1Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1116, USA
  • 2Taipei Municipal University of Education, Taipei, Taiwan
  • 3Department of Physics, University of Washington, Seattle, Washington 98105, USA
  • 4Department of Physics and Astronomy, University of California at Riverside, Riverside, California 92521, USA

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Vol. 78, Iss. 1 — 1 July 2008

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