The vector boson transverse momentum distributions
Ignazio Scimemi
TL;DR
This paper discusses the role of transverse momentum dependent distributions (TMD) in vector boson production, highlighting their dependence on parton distribution functions (PDF) and addressing the PDF bias issue.
Contribution
It introduces a solution to reduce PDF bias in TMD, but emphasizes that PDF uncertainties remain the main source of error in vector boson spectra.
Findings
TMD are sensitive to PDF choice and quality.
A method to mitigate PDF bias in TMD is proposed.
PDF uncertainties dominate the error in vector boson spectra.
Abstract
The transverse momentum dependent distributions (TMD) are an essential part of the factorization theorems in vector boson production. They are non-perturbative, double scale dependent functions that asymptotically match onto collinear parton distributions functions (PDF). Once TMD are expressed using PDF, one observes that they are sensitive to the choice and quality of PDF sets (PDF bias). A solution to this problem is found and discussed. Nevertheless the main source of error on vector boson spectra still comes from PDF uncertainty propagation.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions