Transverse momentum dependent (TMD) parton distribution functions: status and prospects

R. Angeles-Martinez , A. Bacchetta , I.I. Balitsky , D. Boer , M. Boglione , R. Boussarie , F.A. Ceccopieri , I.O. Cherednikov

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P. Connor M.G. Echevarria G. Ferrera J. Grados Luyando F. Hautmann H. Jung T. Kasemets K. Kutak J.P. Lansberg A. Lelek G. Lykasov J.D. Madrigal Martinez P.J. Mulders E.R. Nocera E. Petreska C. Pisano R. Placakyte V. Radescu M. Radici G. Schnell I. Scimemi A. Signori L. Szymanowski S. Taheri Monfared F.F. Van der Veken H.J. van Haevermaet P. Van Mechelen A.A. Vladimirov S. Wallon

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classification ✦ hep-ph

keywords momentumpartontransverseapplicationbosonsdependentdistributionfunctions

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We provide a concise overview on 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_T spectra of Higgs and vector bosons for low q_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 an application of a new tool, TMDlib, to parton density fits and parameterizations.

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Transverse momentum dependent (TMD) parton distribution functions: status and prospects

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