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Seminar | High Energy Physics Division

Transverse Momentum Distributions with Jets

HEP Theory Seminar

Abstract: In this talk, we investigate the use of jets to measure transverse momentum distributions (TMDs). The example we use to present our framework is the dijet momentum decorrelation at lepton colliders. We study the effect of the election of the axis in the description of the jet. Critically, for an axis insensitive to recoil, the so-called Winner-Take-All axis, the jet TMD has the same double-scale renormalization group evolution as TMD fragmentation functions for all radii R. This fact means that TMD fragmentation functions that appear in factorization theorems for processes with hadrons in the final state may then simply be replaced by the jet TMDs we calculate, and all ingredients to perform the resummation to next-to-next-to-leading logarithmic accuracy are available. Some numerical results for interesting cases are studied and presented.  Moreover, the (un)polarized semi-inclusive deep inelastic scattering case, where a jet instead of a hadron is measured in the final state, is discussed. In this way, we find a clean method to probe the intrinsic transverse momentum of quarks and gluons in the proton that is less sensitive to final-state nonperturbative effects.