First global QCD analysis of the TMD g1T from semi-inclusive DIS data

The worm-gear transverse momentum dependent (TMD) function g(1T) is one of the eight leading-twist TMDs and has the probabilistic interpretation of finding a longitudinally polarized quark inside a transversely polarized hadron. In this work, we present the first simultaneous extraction of g(1T) from all the available experimental measurements. The study involves the analysis of COMPASS, HERMES, and Jefferson Lab data on semi-inclusive deep-inelastic scattering using Monte Carlo techniques. We also compare g(1T) obtained from this experimental data with different theoretical approaches, such as the large-N-c approximation, the Wandzura-Wilczek-type approximation, and lattice QCD.

Automated summary

We present the first simultaneous extraction of the worm-gear transverse momentum dependent function g(1T) from all available experimental measurements, and compare it with different theoretical approaches using Monte Carlo techniques.