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

作者：Boglione M^*; D'Alesio U; Flore C; Gonzalez Hernandez J O

来源：The Journal of High Energy Physics, 2018, 2018(7): 148.

DOI：10.1007/JHEP07(2018)148

• Deep Inelastic Scattering (Phenomenology)
• Phenomenological Models

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- and large-x regions.

• 出版日期2018-7-24