Analytical cross sections and Sivers asymmetry predictions are presented for double quarkonium production via quark-antiquark annihilation at fixed-target experiments, showing a 10-15% asymmetry at COMPASS and small negative asymmetries at LHC fixed-target energies.
TMDlib and TMDplotter: library and plotting tools for transverse-momentum-dependent parton distributions
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abstract
Transverse-momentum-dependent distributions (TMDs) are central in high-energy physics from both theoretical and phenomenological points of view. In this manual we introduce the library, TMDlib, of fits and parameterisations for transverse-momentum-dependent parton distribution functions (TMD PDFs) and fragmentation functions (TMD FFs) together with an online plotting tool, TMDplotter. We provide a description of the program components and of the different physical frameworks the user can access via the available parameterisations.
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2026 1verdicts
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Double quarkonium production in hadronic collisions at fixed-target experiments
Analytical cross sections and Sivers asymmetry predictions are presented for double quarkonium production via quark-antiquark annihilation at fixed-target experiments, showing a 10-15% asymmetry at COMPASS and small negative asymmetries at LHC fixed-target energies.