CTEQ6.6 global analysis

Main reference
 Uncertainty bands
 CTEQ6.6 W, Z, ttbar cross sections
 PDF-PDF correlations
 Additional correlation plots


This web page collects additional figures from the CTEQ6.6 study. The main reference for these figures is
Implications of CTEQ global analysis for collider observables
Authors: P. M. Nadolsky, H.-L. Lai, Q.-H. Cao, J. Huston, J. Pumplin, D. Stump, W.-K. Tung, C.-P. Yuan
E-print: arXiv:0802.0007 [hep-ph]
LaTeX source and figures with embedded Mathematica fonts

PDF uncertainty bands (Encapsulated Postscript)

mu=1.3 GeV
ipdf0_mu1.3.eps
gluon 		ipdf1_mu1.3.eps
u-quark 		ipdf1sea_mu1.3.eps
u-antiquark 		ipdf2_mu1.3.eps
d-quark 		ipdf2sea_mu1.3.eps
d-antiquark 		ipdf3_mu1.3.eps
s-quark

mu=2 GeV
ipdf0_mu2.eps
gluon 		ipdf1_mu2.eps
u-quark 		ipdf1sea_mu2.eps
u-antiquark 		ipdf2_mu2.eps
d-quark 		ipdf2sea_mu2.eps
d-antiquark 		ipdf3_mu2.eps
s-quark 		ipdf4_mu2.eps
c-quark

mu=3.16 GeV
ipdf0_mu3.16.eps
gluon 		ipdf1_mu3.16.eps
u-quark 		ipdf1sea_mu3.16.eps
u-antiquark 		ipdf2_mu3.16.eps
d-quark 		ipdf2sea_mu3.16.eps
d-antiquark 		ipdf3_mu3.16.eps
s-quark 		ipdf4_mu3.16.eps
c-quark

mu=100 GeV
ipdf0_mu100.eps
gluon 		ipdf1_mu100.eps
u-quark 		ipdf1sea_mu100.eps
u-antiquark 		ipdf2_mu100.eps
d-quark 		ipdf2sea_mu100.eps
d-antiquark 		ipdf3_mu100.eps
s-quark 		ipdf4_mu100.eps
c-quark 		ipdf5_mu100.eps
b-quark

45 CTEQ6.6 cross sections for W, Z, ttbar production

Values of W, Z, top-antitop production cross sections at the Tevatron Run-2 and LHC for 45 CTEQ6.6 PDF sets. These values can be used to compute correlation cosines between W, Z, ttbar, and arbitrary collider cross sections. A small program for such computation (written in C) is also available.

Additional correlation plots (Encapsulated Postscript)

W, Z boson production

Dependence of Z boson production at the LHC on s, c, b contributions
The next three figures show correlation cosines for Z boson total production cross sections with PDF's at Q=85 GeV:
  1. with all scattering channels included (same as Fig. 8(c) in the paper);
  2. c-cbar and b-bbar contributions removed;
  3. s-sbar, c-cbar, and b-bbar contributions removed.
Note that there is a strong correlation with the gluon in the first two figures, but not in the third figure. This behavior indicates that the strong correlation with the gluon is mediated for a large part by the s-sbar contribution, and not by c-cbar, b-bar, or quark-glue contributions. In the same spirit, it can be shown that the strong correlation of W boson production with the gluon seen in Fig.8(d) is mediated largely by the c-sbar contribution.
other/z_lhc_pdfq85.eps other/z_lhc_pdfq85_nocb.eps other/z_lhc_pdfq85_noscb.eps
All channels
 No c, b
 No s, c, b

Correlation ellipses between Z and W total cross sections and PDF's at scale Q=2 GeV
Tevatron Run-2
 other/z_tev2_pdfq2.eps other/w_tev2_pdfq2.eps
LHC
 other/z_lhc_pdfq2.eps other/wpm_lhc_pdfq2.eps

Z boson
 W boson

Higgs boson production

Correlation ellipses for inclusive total cross sections for gg->Higgs and Z boson production at the LHC (left column); gg->Higgs and ttbar production at the LHC (right column)

Higgs mass = 120, 200, 500 GeV
other/sixplots.eps

Correlation cosines between the total cross section for gg->Higgs at the LHC and PDF's of various flavors

PDF's at
 Q=85 GeV
 other/h0_120_lhc_pdfq85.eps other/h0_200_lhc_pdfq85.eps other/h0_300_lhc_pdfq85.eps other/h0_500_lhc_pdfq85.eps
PDF's at
Q=2 GeV
 other/h0_120_lhc_pdfq2.eps other/h0_200_lhc_pdfq2.eps other/h0_300_lhc_pdfq2.eps other/h0_500_lhc_pdfq2.eps
Higgs mass
 120 GeV
 200 GeV
 300 GeV
 500 GeV

Correlation cosines  between the total cross sections for Higgs production via WW and ZZ fusion at the LHC and PDF's of various flavors

Higgs mass=120 GeV
PDF's at
 Q=85 GeV		 other/wwh120_lhc_pdfq85.eps other/zzh120_lhc_pdfq85.eps
PDF's at
 Q=2 GeV		 other/wwh120_lhc_pdfq2.eps other/zzh120_lhc_pdfq2.eps

WW fusion
 ZZ fusion
Support: Pavel Nadolsky