Parton Distributions and the Strong Coupling Strength: CTEQ6AB PDFs

Details Parton Distributions and the Strong Coupling Strength: CTEQ6AB PDFs Parton Distributions and the Strong Coupling Strength: CTEQ6AB PDFs

2005-12-13

arxiv.org/abs/hep-ph/0512167v4

JHEP0602:032,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 11 figures, revisions and change in title based on JHEP referee's suggestions; reference added

Scientific paper

10.1088/1126-6708/2006/02/032

We study the global analysis for parton distributions as a function of the QCD strong coupling strength alpha_s, and present a new series of distributions that span the range 0.110 < alpha_s(m_Z) < 0.128. We use these distributions to explore the correlation between alpha_s and the gluon distribution; the viability of global analysis as a method to measure alpha_s; and the dependence on alpha_s of predictions for W, Z, inclusive jet, and Higgs boson production ($b \bar{b} \to H$ and $gg \to H$) cross sections at the Tevatron and the LHC. We find that the uncertainty in alpha_s is the dominant source of uncertainty for inclusive jet production at moderately small p_T and for Higgs production at intermediate masses in the standard model.

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