Study of proton parton distribution functions at high x using ZEUS data

I. Abt, L. Adamczyk, R. Aggarwal, V. Aushev, O. Behnke, U. Behrens, A. Bertolin, I. Bloch, I. Brock, N. H. Brook, R. Brugnera, A. Bruni, P. J. Bussey, A. Caldwell, M. Capua, C. D. Catterall, J. Chwastowski, J. Ciborowski, R. Ciesielski, A. M. Cooper-SarkarM. Corradi, R. K. Dementiev, S. Dusini, J. Ferrando, B. Foster, E. Gallo, D. Gangadharan, A. Garfagnini, A. Geiser, L. K. Gladilin, Yu A. Golubkov, G. Grzelak, C. Gwenlan, D. Hochman, N. Z. Jomhari, I. Kadenko, S. Kananov, U. Karshon, P. Kaur, R. Klanner, U. Klein, I. A. Korzhavina, N. Kovalchuk, H. Kowalski, O. Kuprash, M. Kuze, B. B. Levchenko, A. Levy, B. Löhr, A. Longhin, O. Yu Lukina, I. Makarenko, J. Malka, S. Masciocchi, K. Nagano, J. D. Nam, J. Onderwaater, Yu Onishchuk, E. Paul, I. Pidhurskyi, A. Polini, M. Przybycień, A. Quintero, M. Ruspa, D. H. Saxon, U. Schneekloth, T. Schörner-Sadenius, I. Selyuzhenkov, M. Shchedrolosiev, L. M. Shcheglova, I. O. Skillicorn, W. Słomiński, A. Solano, L. Stanco, N. Stefaniuk, P. Stopa, B. Surrow, J. Sztuk-Dambietz, E. Tassi, K. Tokushuku, M. Turcato, O. Turkot, T. Tymieniecka, A. Verbytskyi, W. A.T. Wan Abdullah, K. Wichmann, M. Wing, S. Yamada, Y. Yamazaki, A. F. Arnecki, L. Zawiejski, O. Zenaiev

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5 Scopus citations


At large values of x, the parton distribution functions (PDFs) of the proton are poorly constrained and there are considerable variations between different global fits. Data at such high x have already been published by the ZEUS Collaboration, but not yet used in PDF extractions. A technique for comparing predictions based on different PDF sets to the observed number of events in the ZEUS data is presented. It is applied to compare predictions from the most commonly used PDFs to published ZEUS data at high Bjorken x. A wide variation is found in the ability of the PDFs to predict the observed results. A scheme for including the ZEUS high-x data in future PDF extractions is discussed.

Original languageEnglish
Article number112009
JournalPhysical Review D
Issue number11
StatePublished - 1 Jun 2020


FundersFunder number
Italian National Institute for Nuclear Physics
Office of Science
Nuclear Physics
Natural Sciences and Engineering Research Council of Canada
Science and Technology Facilities Council05h09GUF, SFB 676
Deutsches Elektronen-Synchrotron
Deutsche Forschungsgemeinschaft
Ministry of Education, Culture, Sports, Science and Technology
Bundesministerium für Bildung und Forschung05 H09PDF, UM.C/625/1/HIR/149
Ministry of Higher Education, Malaysia
Israel Science Foundation
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum NaukiDEC-2014/13/B/ST2/02486
Universiti MalayaER004-2012A, RU006-2013, RP012B-13AFR, RP012A-13AFR


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