Abstract
A common library, TMDlib2, for Transverse-Momentum-Dependent distributions (TMDs) and unintegrated parton distributions (uPDFs) is described, which allows for easy access of commonly used TMDs and uPDFs, providing a three-dimensional (3D) picture of the partonic structure of hadrons. The tool TMDplotter allows for web-based plotting of distributions implemented in TMDlib2, together with collinear pdfs as available in LHAPDF.
Highlights
The calculation of processes at high energy hadron colliders is based in general on the calculation of a partonic process 752 Page 2 of 10Eur
Different factorization theorems for the inclusion of transverse momenta to the parton densities have been developed in the past, leading to so-called Transverse Momentum Dependent (TMD) parton densities and unintegrated parton densities [6]
We describe a new version of the TMDlib library, TMDlib2, as well as the associated online plotting tool TMDplotter
Summary
(matrix element) convoluted with the likelihood to find a parton of specific flavor and momentum fraction at a given scale within the hadrons. Different factorization theorems for the inclusion of transverse momenta to the parton densities have been developed in the past, leading to so-called Transverse Momentum Dependent (TMD) parton densities and unintegrated parton densities (uPDFs) [6]. These densities provide a 3D imaging of hadron structure, extending the 1D picture given by PDFs. For semi-inclusive processes, like semi-inclusive DIS (SIDIS), Drell-Yan (DY) production and e+e− scattering, TMD factorization has been formulated [7,8,9,10,11,12,13,14,15,16,17,18,19].
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