Signal ACao F-G10/03/202210/03/2022Physics Letters B: Nuclear Physics and Particle Physics, 2022, 8260370-2693https://hdl.handle.net/10179/16890(c) The author/sThe typical transverse momentum of a quark in the proton is a basic property of any QCD based model of nucleon structure. However, calculations in phenomenological models typically give rather small values of transverse momenta, which are difficult to reconcile with the larger values observed in high energy experiments such as Drell-Yan reactions and Semi-inclusive deep inelastic scattering. In this letter we calculate the leading twist transverse momentum dependent distribution functions (TMDs) using a generalization of the Adelaide group’s relativistic formalism that has previously given good fits to the parton distributions. This enables us to examine the kT dependence of the TMDs in detail, and determine typical widths of these distributions. These are found to be significantly larger than those of previous calculations. We then use TMD factorization in order to evolve these distributions up to experimental scales where we can compare with data on 〈kT 〉 and 〈k2 T 〉. Our distributions agree well with this data.Quark distributionsQuark modelNucleonJournal article10.1016/j.physletb.2022.136898450912Massey_Dark0105 Mathematical Physics0201 Astronomical and Space Sciences0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics