2013/02/06 by S. Alekhin, Alekhin, S., J. Bluemlein +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.1302.1516
To appear in the proceedings of 11-th DESY Workshop on Elementary Particle Physics - Loops and Legs in Quantum Field Theory, April 15-20, 2012 Wernigerode, Germany
arxiv created 2013/02/06 · arxiv updated 2013/02/07
We report an updated version of the ABKM09 NNLO PDF fit, which includes the most recent HERA collider data on the inclusive cross sections and an improved treatment of the heavy-quark contribution to deep-inelastic scattering using advantages of the running-mass definition for the heavy quarks. The ABM11 PDFs obtained from the updated fit are in a good agreement with the recent LHC data on the W- and Z-production within the experimental and PDF uncertainties. We also perform a determination of the strong coupling constant αs in a variant of the ABM11 fit insensitive to the influence of the higher twist terms and find the value of αs=0.1133(11) which is in good agreement with the nominal ABM11 one and our earlier determination.