Conveners
(TMD) PDFs
- Daniel Boer (University of Groningen)
(TMD) PDFs
- Daniel Boer (University of Groningen)
(TMD) PDFs
- Hannes Jung (Deutsches Elektronen-Synchrotron (DE))
Description
Non-Perturbative TMDS, ...
In double parton scattering (DPS), we consider the limit of perturbative transverse momenta and a large spatial separation between the two hard processes. We discuss the scale and rapidity evolution as well as the matching of transverse momentum dependent double parton distributions onto collinear double parton distributions for processes with a colorless final state. Although the evolution...
We calculate cross sections for various observables in Drell-Yan lepton pair production in p+p and p+Pb collisions within Hybrid High Energy Factrorization. In particular we obtain reasonably good description of invariant mass distribution data using KS linear and KS-nonlinear gluon distribution function. Furthermore we provide prediction for saturation in p+Pb collisions and calculate nuclear...
We study the transverse momentum dependence of hadrons fragmenting inside jets. By measuring the transverse momentum with respect to a judiciously chosen axis (not the standard jet axis), the measurement is insensitive to soft radiation. Furthermore, for small transverse momenta the effects of the jet boundaries can be factorized, leading to a TMD fragmentation function. This TMD fragmentation...
PDFs are nonperturbative objects defined by nonlocal light-cone correlations. They cannot be computed directly from QCD. Using a standard lattice QCD approach, it is possible to compute moments of PDFs, which are matrix elements of local operators. Recently, an alternative approach has been proposed, based on the introduction of quasi-PDFs, which are matrix elements of equal-time spatial...
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...
We describe a new approach to solve coupled quark and gluon DGLAP
evolution equations with a Monte Carlo method. We show that this method
is equivalent to other semi-analytical methods. We apply this method to
extract quark and gluon parton densities, both collinear and transverse
momentum dependent (TMD), using the precision HERA DIS data. We present
also first results including NLO spliting...
Monte Carlos & transverse momentum
We will present a method to obtain TMDs from standard parton shower Monte Carlo generators. We compare the prediction from different MC generators and argue that TMDs are a unique way to compare features of parton shower generators at a theoretical level.
