Journal of High Energy Physics (Dec 2021)
Azimuthal correlations in photoproduction and deep inelastic ep scattering at HERA
- The ZEUS collaboration,
- I. Abt,
- R. Aggarwal,
- V. Aushev,
- O. Behnke,
- A. Bertolin,
- I. Bloch,
- I. Brock,
- N. H. Brook,
- R. Brugnera,
- A. Bruni,
- P. J. Bussey,
- A. Caldwell,
- C. D. Catterall,
- J. Chwastowski,
- J. Ciborowski,
- R. Ciesielski,
- A. M. Cooper-Sarkar,
- M. Corradi,
- R. K. Dementiev,
- S. Dusini,
- J. Ferrando,
- S. Floerchinger,
- 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,
- U. Karshon,
- P. Kaur,
- R. Klanner,
- U. Klein,
- I. A. Korzhavina,
- N. Kovalchuk,
- M. Kuze,
- B. B. Levchenko,
- A. Levy,
- B. Löhr,
- E. Lohrmann,
- A. Longhin,
- F. Lorkowski,
- 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,
- U. Schneekloth,
- T. Schörner-Sadenius,
- I. Selyuzhenkov,
- M. Shchedrolosiev,
- L. M. Shcheglova,
- I. O. Skillicorn,
- W. Słomiński,
- A. Solano,
- L. Stanco,
- N. Stefaniuk,
- B. Surrow,
- K. Tokushuku,
- O. Turkot,
- T. Tymieniecka,
- A. Verbytskyi,
- W. A. T. Wan Abdullah,
- K. Wichmann,
- M. Wing,
- S. Yamada,
- Y. Yamazaki,
- A. F. Żarnecki,
- O. Zenaiev
Affiliations
- The ZEUS collaboration
- I. Abt
- Max-Planck-Institut für Physik
- R. Aggarwal
- DST-Inspire Faculty, Department of Technology, SPPU
- V. Aushev
- Department of Nuclear Physics, National Taras Shevchenko University of Kyiv
- O. Behnke
- Deutsches Elektronen-Synchrotron DESY
- A. Bertolin
- INFN Padova
- I. Bloch
- Deutsches Elektronen-Synchrotron DESY
- I. Brock
- Physikalisches Institut der Universität Bonn
- N. H. Brook
- Physics and Astronomy Department, University College London
- R. Brugnera
- Dipartimento di Fisica e Astronomia del l’Università and INFN
- A. Bruni
- INFN Bologna
- P. J. Bussey
- School of Physics and Astronomy, University of Glasgow
- A. Caldwell
- Max-Planck-Institut für Physik
- C. D. Catterall
- Department of Physics, York University
- J. Chwastowski
- The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences
- J. Ciborowski
- Faculty of Physics, University of Warsaw
- R. Ciesielski
- Deutsches Elektronen-Synchrotron DESY
- A. M. Cooper-Sarkar
- Department of Physics, University of Oxford
- M. Corradi
- INFN Bologna
- R. K. Dementiev
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- S. Dusini
- INFN Padova
- J. Ferrando
- Deutsches Elektronen-Synchrotron DESY
- S. Floerchinger
- Institute for Theoretical Physics, University of Heidelberg
- B. Foster
- Department of Physics, University of Oxford
- E. Gallo
- Hamburg University, Institute of Experimental Physics
- D. Gangadharan
- Physikalisches Institut of the University of Heidelberg
- A. Garfagnini
- Dipartimento di Fisica e Astronomia del l’Università and INFN
- A. Geiser
- Deutsches Elektronen-Synchrotron DESY
- L. K. Gladilin
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- Yu. A. Golubkov
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- G. Grzelak
- Faculty of Physics, University of Warsaw
- C. Gwenlan
- Department of Physics, University of Oxford
- D. Hochman
- Department of Particle Physics and Astrophysics, Weizmann Institute
- N. Z. Jomhari
- Deutsches Elektronen-Synchrotron DESY
- I. Kadenko
- Department of Nuclear Physics, National Taras Shevchenko University of Kyiv
- U. Karshon
- Department of Particle Physics and Astrophysics, Weizmann Institute
- P. Kaur
- Sant Longowal Institute of Engineering and Technology
- R. Klanner
- Hamburg University, Institute of Experimental Physics
- U. Klein
- Deutsches Elektronen-Synchrotron DESY
- I. A. Korzhavina
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- N. Kovalchuk
- Hamburg University, Institute of Experimental Physics
- M. Kuze
- Department of Physics, Tokyo Institute of Technology
- B. B. Levchenko
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- A. Levy
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University
- B. Löhr
- Deutsches Elektronen-Synchrotron DESY
- E. Lohrmann
- Hamburg University, Institute of Experimental Physics
- A. Longhin
- Dipartimento di Fisica e Astronomia del l’Università and INFN
- F. Lorkowski
- Deutsches Elektronen-Synchrotron DESY
- O. Yu. Lukina
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- I. Makarenko
- Deutsches Elektronen-Synchrotron DESY
- J. Malka
- Deutsches Elektronen-Synchrotron DESY
- S. Masciocchi
- Physikalisches Institut of the University of Heidelberg
- K. Nagano
- Institute of Particle and Nuclear Studies, KEK
- J. D. Nam
- Department of Physics, Temple University
- J. Onderwaater
- Physikalisches Institut of the University of Heidelberg
- Yu. Onishchuk
- Department of Nuclear Physics, National Taras Shevchenko University of Kyiv
- E. Paul
- Physikalisches Institut der Universität Bonn
- I. Pidhurskyi
- Institut für Kernphysik, Goethe Universität
- A. Polini
- INFN Bologna
- M. Przybycień
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science
- A. Quintero
- Department of Physics, Temple University
- M. Ruspa
- Università del Piemonte Orientale, Novara and INFN
- U. Schneekloth
- Deutsches Elektronen-Synchrotron DESY
- T. Schörner-Sadenius
- Deutsches Elektronen-Synchrotron DESY
- I. Selyuzhenkov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH
- M. Shchedrolosiev
- Deutsches Elektronen-Synchrotron DESY
- L. M. Shcheglova
- Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
- I. O. Skillicorn
- School of Physics and Astronomy, University of Glasgow
- W. Słomiński
- Department of Physics, Jagellonian University
- A. Solano
- Università di Torino and INFN
- L. Stanco
- INFN Padova
- N. Stefaniuk
- Deutsches Elektronen-Synchrotron DESY
- B. Surrow
- Department of Physics, Temple University
- K. Tokushuku
- Institute of Particle and Nuclear Studies, KEK
- O. Turkot
- Deutsches Elektronen-Synchrotron DESY
- T. Tymieniecka
- National Centre for Nuclear Research
- A. Verbytskyi
- Max-Planck-Institut für Physik
- W. A. T. Wan Abdullah
- National Centre for Particle Physics, Universiti Malaya
- K. Wichmann
- Deutsches Elektronen-Synchrotron DESY
- M. Wing
- Physics and Astronomy Department, University College London
- S. Yamada
- Institute of Particle and Nuclear Studies, KEK
- Y. Yamazaki
- Department of Physics, Kobe University
- A. F. Żarnecki
- Faculty of Physics, University of Warsaw
- O. Zenaiev
- Deutsches Elektronen-Synchrotron DESY
- DOI
- https://doi.org/10.1007/JHEP12(2021)102
- Journal volume & issue
-
Vol. 2021,
no. 12
pp. 1 – 22
Abstract
Abstract Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity ep scattering at a centre-of-mass energy s $$ \sqrt{s} $$ = 318 GeV with the ZEUS detector at HERA. Two- and four-particle azimuthal correlations, as well as multiplicity, transverse momentum, and pseudorapidity distributions for charged-particle multiplicities N ch ≥ 20 are measured. The dependence of two-particle correlations on the virtuality of the exchanged photon shows a clear transition from photoproduction to neutral current deep inelastic scattering. For the multiplicities studied, neither the measurements in photoproduction processes nor those in neutral current deep inelastic scattering indicate significant collective behaviour of the kind observed in high-multiplicity hadronic collisions at RHIC and the LHC. Comparisons of PYTHIA predictions with the measurements in photoproduction strongly indicate the presence of multiparton interactions from hadronic fluctuations of the exchanged photon.
Keywords
- Collective flow
- Lepton-Nucleon Scattering (experiments)
- Particle correlations and fluctuations
- Quark gluon plasma
