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arxiv: 2409.15236 · v2 · pith:QOFMUD6Tnew · submitted 2024-09-23 · ✦ hep-ex

New Measurements of the Deuteron to Proton F2 Structure Function Ratio

Debaditya Biswas , Fernando Araiza Gonzalez , William Henry , Abishek Karki , Casey Morean , Sooriyaarachchilage Nadeeshani , Abel Sun , Daniel Abrams
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Zafar Ahmed Bashar Aljawrneh Sheren Alsalmi George Ambrose Whitney Armstrong Arshak Asaturyan Kofi Assumin-Gyimah Carlos Ayerbe Gayoso Anashe Bandari Samip Basnet Vladimir Berdnikov Hem Bhatt Deepak Bhetuwal Werner Boeglin Peter Bosted Edward Brash Masroor Bukhari Haoyu Chen Jian-Ping Chen Mingyu Chen Michael Eric Christy Silviu Covrig Dusa Kayla Craycraft Samuel Danagoulian Donal Day Markus Diefenthaler Mongi Dlamini James Dunne Burcu Duran Dipangkar Dutta Rolf Ent Rory Evans Howard Fenker Nadia Fomin Eric Fuchey David Gaskell Thir Narayan Gautam Jens-Ole Hansen Florian Hauenstein A. Hernandez Tanja Horn Garth Huber Mark Jones Sylvester Joosten Md Latiful Kabir Cynthia Keppel Achyut Khanal Paul King Edward Kinney Michael Kohl Nathaniel Lashley-Colthirst Shujie Li Wenliang Li Anusha Habarakada Liyanage David Mack Simona Malace Pete Markowitz John Matter David Meekins Robert Michaels Arthur Mkrtchyan Hamlet Mkrtchyan Zae Moore S.J. Nazeer Shirsendu Nanda Gabriel Niculescu Maria Niculescu Huong Nguyen Nuruzzaman Nuruzzaman Bishnu Pandey Sanghwa Park Eric Pooser Andrew Puckett Melanie Rehfuss Joerg Reinhold Bradley Sawatzky G. Smith Holly Szumila-Vance Arun Tadepalli Vardan Tadevosyan Richard Trotta Stephen Wood Carlos Yero Jinlong Zhang
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classification ✦ hep-ex
keywords datadistributionfunctionlargepartonstructured-quarkdeuteron
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Nucleon structure functions, as measured in lepton-nucleon scattering, have historically provided a critical observable in the study of partonic dynamics within the nucleon. However, at very large parton momenta it is both experimentally and theoretically challenging to extract parton distributions due to the probable onset of non-perturbative contributions and the unavailability of high precision data at critical kinematics. Extraction of the neutron structure and the d-quark distribution have been further challenging due to the necessity of applying nuclear corrections when utilizing scattering data from a deuteron target to extract free neutron structure. However, a program of experiments has been carried out recently at the energy-upgraded Jefferson Lab electron accelerator aimed at significantly reducing the nuclear correction uncertainties on the d-quark distribution function at large partonic momentum. This allows leveraging the vast body of deuterium data covering a large kinematic range to be utilized for d-quark parton distribution function extraction. We present new data from experiment E12-10-002 carried out in Jefferson Lab Hall C on the deuteron to proton cross-section ratio at large BJorken-x. These results significantly improve the precision of existing data, and provide a first look at the expected impact on quark distributions extracted from global parton distribution function fits.

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Cited by 2 Pith papers

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