May 22 – 26, 2023
IJCLab, Orsay (FRANCE)
Europe/Paris timezone

First simultaneous global QCD analysis of transverse momentum dependent and collinear distributions in the proton

May 22, 2023, 2:35 PM
Auditorium Joliot Curie (IJCLab, Orsay (FRANCE))

Auditorium Joliot Curie

IJCLab, Orsay (FRANCE)

15, Rue G. Clemenceau 91405 Orsay Cedex FRANCE


Patrick Barry


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.

Primary authors

Alexey Prokudin (PSU Berks and JLab) Alexey Vladimirov (Universidad Complutense de Madrid) Daniel Pitonyak (Lebanon Valley College) Eric Moffat (Argonne National Lab) Dr Jianwei Qiu (Jefferson Lab) Prof. Leonard Gamberg (Penn State University Berks) Nobuo Sato Patrick Barry Wally Melnitchouk (Jefferson Lab)

Presentation materials