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CTEQ6.6: correlations between
parton distribution functions

Main reference

PDF uncertainty bands

CTEQ6.6 W, Z, ttbar cross sections

Additional correlation plots

A collection of 2-dimensional contour plots showing the correlation cosine cos(phi) for two  parton distribution functions (PDF's) fa(x,Q) obtained in the CTEQ6.6 global analysis. The axes specify momentum fractions x in the two PDF's with specified flavors and factorization scales. The color (or gray shade) of the area is chosen to reflect the value of the correlation cosine at each (x1, x2) point according to the scale shown below. Both axes are scaled as x0.2.

Flavor of the PDF 1 gluon up down upbar downbar s=sbar c=cbar b=bar Factorization scale of the PDF 1 Q=2 GeV Q=85 GeV Flavor of the PDF 2 gluon up down upbar downbar s=sbar c=cbar b=bar Factorization scale of the PDF 2 Q=2 GeV Q=85 GeV Color Grayscale Color scale pdf  png

• All figures in one .tar.gz file: pdf (color)  pdf (grayscale)   png (color)   png (grayscale)
• Tables of CTEQ6.6 PDF's for 10^-5 < x < 1 and Q=1.3, 2, 3.16, 8, 85 GeV used to produce these figures

Support: Pavel Nadolsky