Accès ouvert déclaré
2024
preprint
New Measurements of the Deuteron to Proton F2 Structure Function Ratio
Debaditya Biswas, F. A. Gonzalez, William Henry, A. Karki, Casey Morean, Sooriyaarachchilage Nadeeshani, Abel Sun, D. Abrams, Zafar Ahmed, Bashar Aljawrneh, S. Alsalmi, George Ryan Ambrose, W. Armstrong, Arshak Asaturyan, K. Assumin-Gyimah, C. Ayerbe Gayoso, Anashe Bandari, S. Basnet, Vladimir V. Berdnikov, Hem Bhatt, D. Bhetuwal, W. Boeglin, Peter Bosted, E. Brash, M. H. S. Bukhari, Haoyu Chen, Jianping Chen, Mingyu Chen, Michael Christy, S. Covrig Dusa, K. Craycraft, S. Danagoulian, Donal B. Day, M. Diefenthaler, M. Dlamini, James A. Dunne, B. Duran, Dipangkar Dutta, R. Ent, Rory Evans, H. Fenker, N. Fomin, Eric Fuchey, David J. Gaskell, Thir Narayan Gautam, J.D. Hansen, F. Hauenstein, A. De Yta-Hernandez, Tanja Horn, Garth M. Huber, Mark K. Jones, S. Joosten, M. L. Kabir, C. Keppel, Achyut Khanal, Paul H. King, Edward R. Kinney, Michael Köhl, N. Lashley-Colthirst, S. Li, Wenliang Li, A. H. Liyanage, David R. Mack, S. Malace, Pete Markowitz, John C. Matter, D. Meekins, R. Michaels, Arthur Mkrtchyan, H. Mkrtchyan, S. J. Nazeer, S. Nanda, Gabriel Niculescu, I. Niculescu, Huong Thanh Nguyen, Nuruzzaman Nuruzzaman, Bishnu Pandey, Sanghwa Park, E. Pooser, Andrew Puckett, Melanie Rehfuss, B. Sawatzky, G.R. Smith, Holly Szumila-Vance, Arun S. Tadepalli, Vardan Tadevosyan, Richard Trotta, Stephen P. Wood, C. Yero, Jinlong Zhang
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Le résumé fourni par la source
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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Les sujets associés
Quantum, superfluid, helium dynamicsNuclear Physics and ApplicationsMethane Hydrates and Related Phenomena