Speaker
Description
In this work, we for the first time extract collinear and transverse momentum dependent (TMD) parton distribution functions (PDFs) in the proton simultaneously from precise high energy Drell-Yan and $Z$-boson production $q_T$-dependent data. We make use of TMD factorization, which is conveniently formulated in $b_T$-space, the Fourier conjugate to intrinsic transverse momentum $k_T$. At collider facilities, the low-$q_T$ data are especially sensitive to the perturbative contributions in small $b_T$ because of the wide availability of phase space and gluon radiations. The perturbative contributions to the cross sections are described by the operator product expansion (OPE) through collinear PDFs. In this way, we are able to study the impacts on the collinear PDFs from transverse-momentum dependent as well as purely collinear data.
