Parton Distribution Uncertainties using Smoothness Prior

Details Parton Distribution Uncertainties using Smoothness Prior Parton Distribution Uncertainties using Smoothness Prior

2010-09-30

arxiv.org/abs/1009.6170v1

Phys.Lett.B695:238-241,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 figures

Scientific paper

10.1016/j.physletb.2010.11.025

A study of the parameterization uncertainty at low Bjorken $x \le 0.1$ for the parton distribution functions of the proton is presented. The study is based on the HERA I combined data using a flexible parameterization form based on Chebyshev polynomials with and without an additional regularization constraint. The accuracy of the data allows to determine the gluon density in the kinematic range of $0.0005 \le x \le 0.05 $ with a small parameterization uncertainty. An additional regularization prior leads to a significantly reduced uncertainty for $x \le 0.0005$.

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