HERAPDF1.0 FIT

         HERAPDF1.0 is described in this paper . The separate figures from this paper are given on this link.

HERAPDF1.0 PDFs with experimental and model and parameterization uncertainties at various Q² [GeV²] values:

u-val d-val, total sea and gluon	1.9	10	100	1000	10000
U, D, Ubar and Dbar	1.9	10	100	1000	10000
ubar, dbar, sbar and cbar	1.9	10 , 10*	100	1000	10000

Note: *A blue line indicates the result if mc = 1.65 GeV is used as the charm mass

Summary plots of valence, total sea and gluon (experimental and model and parameterization uncertainties) at various Q² [GeV²] values [also with y-axis in log scale]:

1.9 , 1.9 log y

10 , 10 log y

Variation on a_s(M_Z) : a_s(M_Z) = 0.1176 [HERAPDF1.0] , a_s(M_Z) = 0.1156 and 0.1196.

          Plots correspond to Q² = 10 GeV² (with experimental and model and parameterization uncertainties) for:

u-val, d-val, total sea and gluon

gluon

Variation of Heavy Quark Scheme : Standard Robert Thorne [HERAPDF1.0] to ACOT.

          Plots correspond to Q² = 10 GeV² (with experimental and model and parameterization uncertainties) for:

u-val, d-val, total sea and gluon

u-val, d-val, total sea and gluon [Blue line indicates the result for the Robert Thorne scheme if mc = 1.65 GeV for the charm mass]

Summary plots with the negative gluon variation NOT included. This variation of the HERAPDF1.0 is called HERAPDF1.a. In this case, the parametrisation variation in which the starting scale is lowered to Q₀²=1.5 GeV² uses the standard parametrisation. Included are the experimental and model and parameterization uncertainties at various Q² [GeV²] values [also with y-axis in log scale]:

1.9 , 1.9 log y

10 , 10 log y

Summary plots to facilitate comparison to H1PDF2009 [also change in scale]. In this case a variant of HERAPDF1.0 called HERAPDF1.b is used in which ONLY those model and parametrsiation variations are considered which are ALSO considered by H1PDF2009. This means that the variation with Q₀²=2.5 GeV²(and m_c=1.6 GeV) is NOT considered nor is the variation with a negative gluon term at Q₀²=1.5 GeV². In this case the parametrisation used at Q₀²=1.5 GeV² is the standard one. Included are the experimental and model and parameterization uncertainties at various Q² [GeV²] values [also with y-axis in log scale]:

1.9 , 1.9 log y

10 , 10 log y

Summary plots (valence, total sea and gluon) including experimental uncertainties comparing HERAPDF1.0 to HERAPDF0.1 at Q² = 2 and Q² = 10 GeV².

Summary plots (valence, total sea and gluon) including experimental and model and parameterization uncertainties comparing HERAPDF1.0 to CTEQ66 at Q² = 10 GeV². Plots are at 68% and 90% CL. Also given are the 68% and 90% CL plots where the negative gluon variation is not included [HERAPDF1.a]; HERAPDF1.a is most appropriate for comparing to CTEQ66.

Summary plots (valence, total sea and gluon) including experimental and model and parameterization uncertainties comparing HERAPDF1.0 to MSTW08 at Q² = 10 GeV². Plots are at 68% and 90% CL. Also given are the 68% and 90% CL plots where the negative gluon variation is not included [HERAPDF1.a]; the standard fit with the negative gluon is most appropriate for comparisonto MSTW08.

Contact Person (H1) : Voica Radescu (voica@mail.desy.de)

^{Contact Person (ZEUS) : Amanda Cooper-Sarkar (a.cooper-sarkar1@physics.ox.ac.uk}

^{H1ZEUS PDF}

^{HERAPDF1.0                                  H1ZEUS Results}