Perturbative QCD at HERA
نویسنده
چکیده
The H1 and ZEUS combined data set on Neutral Current (NC) and Charged Current (CC) ep and ep inclusive cross sections is used as the input for next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) QCD parton density function (PDF) fits resulting in a new preliminary PDF set called HERAPDF2.0 (prel.). The analysis yields small experimental uncertainties and includes estimates for model and parametrisation uncertainties. Figure 1 shows the parton distribution functions xuv, xdv, xS = 2x(Ū + D̄) and xg from HERAPDF2.0 (prel.) at the factorisation scale μ2f = 10GeV 2 for the Qmin = 3.5GeV 2 fit at NLO and NNLO.
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