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We use all the available new precise data for deep inelastic and related hard scattering processes to perform NLO global parton analyses. These new data allow an improved determination of partons and, in particular, the inclusion of the recent measurements of the structure functions at HERA and of the inclusive jets at the Tevatron help to determine the(More)
We perform a global parton analysis of deep inelastic and related hard-scattering data, including O(α QED) corrections to the parton evolution. Although the quality of the fit is essentially unchanged, there are two important physical consequences. First, the different DGLAP evolution of u and d type quarks introduces isospin violation, i.e. u p = d n ,(More)
We present LO, NLO and NNLO sets of parton distribution functions (PDFs) of the proton determined from global analyses of the available hard scattering data. These MMHT2014 PDFs supersede the 'MSTW2008' parton sets, but they are obtained within the same basic framework. We include a variety of new data sets, from the LHC, updated Tevatron data and the HERA(More)
We present a new analysis of parton distributions of the proton. This incorporates a wide range of new data and an improved treatment of heavy flavours and prompt photon production. The new set (MRST) shows systematic differences from previous sets of partons which can be identified with particular features of the new data and with improvements in the(More)
We determine the uncertainties on observables arising from the errors on the experimental data that are fitted in the global MRST2001 parton analysis. By diagonalizing the error matrix we produce sets of partons suitable for use within the framework of linear propagation of errors, which is the most convenient method for calculating the uncertainties.(More)
We give a general formula for the cross section for diffractive vector meson electro-production, γ * p → V p. We first calculate diffractive q ¯ q production, and then use parton-hadron duality by projecting out the J P = 1 − state in the appropriate mass interval. We compare the Q 2 dependence of the cross section for the diffractive production of ρ and(More)
We present a formulation which allows heavy quark (c, b,. . .) mass effects to be explicitly incorporated in both the coefficient functions and the splitting functions in the parton evolution equations. We obtain a consistent procedure for evolution through the threshold regions for cc and bb production in deep inelastic scattering, which allows the(More)