PDF bias and flavor dependence in TMD distributions

Abstract

Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determination of unpolarized TMD distributions and the description of Drell-Yan (DY) and Z-boson production measurements at low transverse momenta. We take into account, for the first time, flavor-dependent non-perturbative TMD profiles. We carry out a Bayesian analysis to incorporate the propagation of PDF uncertainties into TMD extractions. We find that collinear PDF uncertainties and non-perturbative TMD flavor dependence are both essential to obtain reliable TMD determinations, and should be included in future global analyses.

27 pages, 14 figures, SupplimentaryMaterials.pdf (26 pages) attached to the submission; ver2.: multiple updates to the text

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Cited by in corpus (23)

• Unpolarized Transverse Momentum Distributions from a global fit of Drell-Yan and Semi-Inclusive Deep-Inelastic Scattering data
• Flavor dependence of unpolarized quark Transverse Momentum Distributions from a global fit
• Lattice Calculation of the Intrinsic Soft Function and the Collins-Soper Kernel
• Tomography of pions and protons via transverse momentum dependent distributions
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Drell-Yan Transverse-Momentum Spectra at N${}^3$LL${}^{\prime }$ and Approximate N${}^4$LL with SCETlib
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• Transverse momentum moments
• The small kt-region in Drell-Yan production at next-to-leading order with the Parton Branching Method
• Sivers, Boer-Mulders and worm-gear distributions at next-to-leading order
• Nonperturbative renormalization of asymmetric staple-shaped operators in twisted mass lattice QCD
• Study of worm-gear-T function $g_{1T}$ with semi-inclusive DIS data
• The resolution to the problem of consistent large transverse momentum in TMDs
• Triply Heavy $\Omega$ Baryons with JETHAD: A High-Energy Viewpoint
• Tetraquark-Jet Systems at the High-Luminosity LHC
• Collins-Soper Kernel in the QCD Instanton Vacuum
• Energy-scaling behavior of intrinsic transverse momentum parameters in Drell-Yan simulation
• Transverse momentum dependent distribution functions in the threshold limit
• Collinear and TMD distributions with dynamical soft-gluon resolution scale
• Collins-Soper kernel from lattice QCD at the physical pion mass
• Coarse-grained binning in Drell-Yan transverse momentum spectra
• Lattice QCD Benchmark of Proton Helicity and Flavor-Dependent Unpolarized Transverse Momentum-Dependent Parton Distribution Functions at Physical Quark Masses
• Deep Neural Network extraction of Unpolarized Transverse Momentum Distributions