2,041 research outputs found
Inclusion of W^+- single-spin asymmetry data in a polarised PDF determination via Bayesian reweighting
We discuss how the experimental information from longitudinal single-spin
asymmetries for boson production in polarised proton-proton
collisions can be included in a polarised parton determination by Bayesian
reweighting of a Monte Carlo set of polarised PDF replicas. We explicitly
construct a prior ensemble of polarised parton distributions using available
fits to inclusive and semi-inclusive DIS data and we discuss the potential
impact of existing and future RHIC measurements on it.Comment: 5 pages, 4 figures, to appear in the proceedings of the 3rd Workshop
on the QCD Structure of the Nucleon (QCD-N'12), Bilbao October 201
Fragmentation functions of charged hadrons
I present a preliminary determination of the Fragmentation Functions (FFs) of
unidentified charged hadrons at next-to-leading order in quantum
chromodynamics. The analysis is based on hadron production cross section data
in single-inclusive electron-positron annihilation. It extends a recent
determination of the FFs of identified charged pions, charged kaons and
protons/antiprotons performed by the NNPDF Collaboration. I illustrate the
quality of the FFs determined in this analysis and show how they describe the
charged hadron spectra measured in proton-(anti)proton collisions.Comment: 5 pages, 3 figures, 1 table, contribution to the proceedings of the
XXV Workshop on Deep-Inelastic Scattering and related Subjects (DIS2017
A Mathematica interface to NNPDFs
We present a Mathematica interface for handling the parton distribution
functions of the NNDPF Collaboration, available from the NNPDF hepforge website
http://nnpdf.hepforge.org/. As a case study we briefly summarise the first PDF
set which includes all relevant LHC data, NNPDF2.3, and demonstrate the use of
our new Mathematica interface.Comment: 4 pages, 5 figures, to appear in the proceedings of the 16th
International Conference in Quantum Chromodynamics (QCD2012), Montpellier
July 201
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