We present preliminary results on the determination of spin-dependent, or polarised, Parton Distribution Functions (PDFs) from all relevant inclusive polarised DIS data. The analysis is performed within the NNPDF approach, which provides a faithful and statistically sound representation of PDFs and their uncertainties. We describe how the NNPDF methodology has been extended to the polarised case, and compare our results with other recent polarised parton sets. We show that polarised PDF uncertainties can be sizeably underestimated in standard determinations, most notably for the gluon.

Unbiased Polarised Parton Distribution Functions and their Uncertainties

Emanuele R. Nocera;Stefano Forte;Giovanni Ridolfi;
2013-01-01

Abstract

We present preliminary results on the determination of spin-dependent, or polarised, Parton Distribution Functions (PDFs) from all relevant inclusive polarised DIS data. The analysis is performed within the NNPDF approach, which provides a faithful and statistically sound representation of PDFs and their uncertainties. We describe how the NNPDF methodology has been extended to the polarised case, and compare our results with other recent polarised parton sets. We show that polarised PDF uncertainties can be sizeably underestimated in standard determinations, most notably for the gluon.
2013
20th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2012)
Bonn
26-30 marzo 2012
20th International Workshop on Deep-Inelastic Scattering and Related Subjects
DESY
1
5
Emanuele R. Nocera; Stefano Forte; Giovanni Ridolfi; Juan Rojo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1889840
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