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arXiv · 1806.10645

Assessing signals of TMD physics in SIDIS azimuthal asymmetries and in the extraction of the Sivers function

M. Boglione·U. D'Alesio·C. Flore·J. O. Gonzalez-Hernandez
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Abstract

New data on the Sivers azimuthal asymmetry measured in semi-inclusive deep-inelastic scattering processes have recently been released by the COMPASS Collaboration at CERN. Their increased precision and their particular binning, in terms of $Q^2$ as well as $x$, motivates a new extraction of the Sivers function, within the framework of a simple and transparent parametrization. Signals of TMD effects visible in the Sivers asymmetries are critically assessed. A thorough study of the uncertainties affecting the extracted Sivers function is presented, including the low-$x$ and large-$x$ regions.

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M. Boglione, U. D'Alesio, C. Flore, J. O. Gonzalez-Hernandez. 2018-06-27. Assessing signals of TMD physics in SIDIS azimuthal asymmetries and in the extraction of the Sivers function. https://doi.org/10.1007/jhep07(2018)148

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