Determination and application of TMD parton densities using the Parton Branching method

TMDs and Monte Carlo Event Generators

“…Figs. 1, 2 [18] show results from PB fits to the HERA high-precision inclusive DIS data [19]. The fits use NLO evolution kernels in Eq.…”

“…In Fig. 1 two fitted TMD sets are presented, differing by the treatment of the momentum scale in the coupling α s , so that one can compare the effects of α s evaluated at the transverse momentum scale prescribed by the angular-ordered branching [14,18] with α s evaluated at the evolution scale. The TMDs are extracted including a determination of experimental and theoretical uncertainties.…”

“…Figure1: Measurements of the reduced cross section[19] compared to predictions using PB -TMD Set 1 and Set 2 from[18].…”

Hadron structure and parton branching beyond collinear approximations

“…Steps toward TMD MCs have recently been taken in the works [6][7][8][9] , in which a parton branching formalism is proposed for TMD evolution, and applications to deep inelastic scattering (DIS) and Drell-Yan (DY) processes are presented. In the following we give a brief account of these studies.…”

“…Fig.1. TMD ū and gluon distributions as a function of k T for µ = 100 GeV at x = 0.017 . In the lower panels the relative uncertainties are shown, coming from experimental uncertainties and the total of experimental and model uncertainties.…”