Transverse Momentum Dependent (TMD) Parton Distribution Functions: Status and Prospects
R. Angeles-Martinez (School of Physics and Astronomy, University of Manchester, UK); A. Bacchetta (INFN Sezione di Pavia and Dipartimento di Fisica, Università di Pavia, Italy); I.I. Balitsky (Physics Department, ODU and Theory Group, JLab, USA); D. Boer (Van Swinderen Institute, University of Groningen, The Netherlands); M. Boglione (Dipartimento di Fisica, Università di Torino and INFN, Torino, Italy); et al - Show all 37 authors
We review transverse momentum dependent (TMD) parton distribution functions, their application to topical issues in high-energy physics phenomenology, and their theoretical connections with QCD resummation, evolution and factorization theorems. We illustrate the use of TMDs via examples of multi-scale problems in hadronic collisions. These include transverse momentum $q_{\rm T}$ spectra of Higgs and vector bosons for low $q_{\rm T}$, and azimuthal correlations in the production of multiple jets associated with heavy bosons at large jet masses. We discuss computational tools for TMDs, and present the application of a new tool, {\sc TMDlib}, to parton density fits and parameterizations.
