Speakers
Description
We present an extraction of unpolarized partonic transverse momentum distributions (TMDs) from a simultaneous fit of available data measured in semi-inclusive deep inelastic scattering, Drell-Yan processes, and Z boson production by different experimental collaborations. To connect data at different scales, we use TMD evolution at next-to-leading logarithmic accuracy. The analysis is restricted to the low-transverse-momentum region, with no matching to fixed-order calculations at high transverse momentum. We introduce specific choices to deal with TMD evolution at low scales, of the order of 1 GeV$^2$. We show the results of our fit, discussing the characteristics of the TMD functional forms extracted and what improvements can be made to our analysis. This could be considered as a first attempt at a global fit of TMDs.
