{"acknowledgement":"P.F. and C.L. acknowledge support from Fundação para a Ciência e a Tecnologia, Portugal, under contract CERN/FIS-PAR/0010/2019.\r\nOpen Access funded by SCOAP3.","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png"},"date_updated":"2024-01-09T09:02:22Z","intvolume":"       840","status":"public","abstract":[{"text":"Several fixed-target experiments reported J/ψ and ϒ polarizations, as functions of Feynman x (xF) and transverse momentum (PT), in three different frames, using different combinations of beam particles, target nuclei, and collision energies. Despite the diverse and heterogeneous picture formed by these measurements, a detailed look allows us to discern qualitative physical patterns that inspire a simple empirical model. This data-driven scenario offers a good quantitative description of the J/ψ and ϒ(1S) polarizations measured in proton- and pion-nucleus collisions, in the xF 0.5 domain: more than 80 data points (not statistically independent) are well reproduced with only one free parameter. This study sets the context for future low-PT\r\n quarkonium polarization measurements in proton- and pion-nucleus collisions, such as those to be made by the AMBER experiment, and shows that such measurements provide significant constraints on the poorly-known parton distribution functions of the pion.","lang":"eng"}],"day":"10","quality_controlled":"1","has_accepted_license":"1","article_type":"original","volume":840,"language":[{"iso":"eng"}],"file_date_updated":"2024-01-09T08:59:24Z","author":[{"last_name":"Faccioli","first_name":"Pietro","full_name":"Faccioli, Pietro"},{"last_name":"Krätschmer","id":"30d4014e-7753-11eb-b44b-db6d61112e73","full_name":"Krätschmer, Ilse","orcid":"0000-0002-5636-9259","first_name":"Ilse"},{"first_name":"Carlos","full_name":"Lourenço, Carlos","last_name":"Lourenço"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","department":[{"_id":"MaRo"}],"article_number":"137871","publication":"Physics Letters B","date_created":"2024-01-08T13:09:17Z","file":[{"file_size":855494,"date_created":"2024-01-09T08:59:24Z","file_name":"2023_PhysicsLettersB_Faccioli.pdf","content_type":"application/pdf","date_updated":"2024-01-09T08:59:24Z","relation":"main_file","file_id":"14762","access_level":"open_access","success":1,"creator":"dernst","checksum":"02dec160dbc81d95985e755869d8afbf"}],"year":"2023","ddc":["530"],"date_published":"2023-05-10T00:00:00Z","article_processing_charge":"Yes (via OA deal)","doi":"10.1016/j.physletb.2023.137871","publication_identifier":{"issn":["0370-2693"],"eissn":["1873-2445"]},"_id":"14753","title":"Low-pT quarkonium polarization measurements: Challenges and opportunities","month":"05","oa_version":"Published Version","keyword":["Nuclear and High Energy Physics"],"type":"journal_article","citation":{"apa":"Faccioli, P., Krätschmer, I., &#38; Lourenço, C. (2023). Low-pT quarkonium polarization measurements: Challenges and opportunities. <i>Physics Letters B</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.physletb.2023.137871\">https://doi.org/10.1016/j.physletb.2023.137871</a>","short":"P. Faccioli, I. Krätschmer, C. Lourenço, Physics Letters B 840 (2023).","mla":"Faccioli, Pietro, et al. “Low-PT Quarkonium Polarization Measurements: Challenges and Opportunities.” <i>Physics Letters B</i>, vol. 840, 137871, Elsevier, 2023, doi:<a href=\"https://doi.org/10.1016/j.physletb.2023.137871\">10.1016/j.physletb.2023.137871</a>.","ieee":"P. Faccioli, I. Krätschmer, and C. Lourenço, “Low-pT quarkonium polarization measurements: Challenges and opportunities,” <i>Physics Letters B</i>, vol. 840. Elsevier, 2023.","chicago":"Faccioli, Pietro, Ilse Krätschmer, and Carlos Lourenço. “Low-PT Quarkonium Polarization Measurements: Challenges and Opportunities.” <i>Physics Letters B</i>. Elsevier, 2023. <a href=\"https://doi.org/10.1016/j.physletb.2023.137871\">https://doi.org/10.1016/j.physletb.2023.137871</a>.","ista":"Faccioli P, Krätschmer I, Lourenço C. 2023. Low-pT quarkonium polarization measurements: Challenges and opportunities. Physics Letters B. 840, 137871.","ama":"Faccioli P, Krätschmer I, Lourenço C. Low-pT quarkonium polarization measurements: Challenges and opportunities. <i>Physics Letters B</i>. 2023;840. doi:<a href=\"https://doi.org/10.1016/j.physletb.2023.137871\">10.1016/j.physletb.2023.137871</a>"},"scopus_import":"1","oa":1,"publisher":"Elsevier","publication_status":"published"}