Unbiased polarized PDFs upgraded with new inclusive DIS data

16th Workshop on High Energy Spin Physics

Nocera, Emanuele R.^1

Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford

0X1 3NP, United Kingdom^1

关键词: COMPASS experiment;    Deep inelastic scattering;    Parton distribution functions;    State of the art;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/678/1/012030/pdf
DOI  :  10.1088/1742-6596/678/1/012030

来源: IOP

【 摘 要 】

I present a determination of longitudinally-polarized parton distribution functions of the proton from inclusive deep-inelastic scattering data: NNPDFpol1.0+. This determination, based on the NNPDF methodology, upgrades a previous analysis, NNPDFpol1.0, in two respects: first, it includes all new data sets which have recently become available from the COMPASS experiment at CERN and from the E93-009, EG1-DVCS and E06-014 experiments at JLAB; second, it uses the state-of-the-art unpolarized parton set NNPDF3.0 as a baseline for the reconstruction of fitted observables and for the determination of positivity constraints. I discuss the impact of both these new inputs on the uncertainty of parton distribution functions.