Now showing items 1-11 of 11

    • MRST partons generated in a fixed-flavor scheme. 

      Martin, AD; Stirling, William James; Thorne, Robert S (High Energy Physics, Cavendish Laboratory, University of Cambridge, 2006-03)
      We generate fixed three- and four-light-flavour sets of partons using MRST2004 partons as input. We show that it is important to set nf = 3 in the strong coupling, as well as in the splitting and coefficient functions, in ...
    • MRST2001: Partons and alpha(s) from precise deep inelastic scattering and Tevatron jet data. 

      Martin, AD; Roberts, RG; Stirling, William James; Thorne, Robert S (HEP, Cavendish Laboratory, University of Cambridge, 2001-10)
      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 ...
    • NNLO global parton analysis. 

      Martin, AD; Roberts, RG; Stirling, William James; Thorne, Robert S
      We perform a NNLO (and a LO) global parton analysis in which we include the new precise data for deep inelastic scattering from HERA and for inclusive jet production at the Tevatron, together with the improved knowledge ...
    • Parton distributions for the LHC. 

      Martin, AD; Stirling, William James; Thorne, Robert S; Watt, G (High Energy Physics, Department of Physics,University of Cambridge, 2009-01)
      We present updated leading-order, next-to-leading order and next-to-next-to-leading order parton distribution functions (“MSTW 2008”) determined from global analysis of hard-scattering data within the standard framework ...
    • Questions on uncertainties in parton distributions. 

      Thorne, Robert S; Bottcher, H; Cooper-Sarkar, Amanda M; Reisert, B; Chekelian, V; Stirling, William James; Stump, DR et al. (2002-05)
    • Recent progress in parton distributions and implications for LHC physics. 

      Thorne, Robert S; Martin, AD; Roberts, RG (2005-07)
    • The Role of F(L)(x,Q**2) in parton analyses. 

      Martin, AD; Stirling, William James; Thorne, Robert S (High Energy Physics, Cavendish Laboratory, University of Cambridge, 2006-01)
      We investigate the effect of the structure function FL in global parton analyses of deep inelastic and related hard scattering data. We perform NLO and NNLO analyses which include the reduced cross section HERA data at ...
    • Uncertainties of predictions from parton distributions. 1: Experimental errors. 

      Martin, AD; Roberts, RG; Stirling, William James; Thorne, Robert S (HEP, Cavendish Laboratory, University of Cambridge, 2002-11)
      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 ...
    • Uncertainties of predictions from parton distributions. 2. Theoretical errors. 

      Martin, AD; Roberts, RG; Stirling, William James; Thorne, Robert S (HEP, Cavendish Laboratory, University of Cambridge, 2003-08)
      We study the uncertainties in parton distributions, determined in global fits to deep inelastic and related hard scattering data, due to so-called theoretical errors. Amongst these, we include potential errors due to the ...
    • Uncertainties on alpha(S) in global PDF analyses and implications for predicted hadronic cross sections. 

      Martin, AD; Stirling, William James; Thorne, Robert S; Watt, G (2009)
      We determine the uncertainty on the strong coupling S due to the experimental errors on the data fitted in global analysis of hard-scattering data, within the standard framework of leading-twist fixed-order collinear ...
    • Update of MRST parton distributions. 

      Thorne, Robert S; Martin, AD; Stirling, William James; Roberts, RG (HEP, Cavendish Laboratory, University of Cambridge, 2004-07)