Azimuthal correlations in photoproduction and deep inelastic $ep$ scattering at HERA
Creators: name: Abt, Iris
name: Aggarwal, Ritu
name: Aushev, Vladimir
name: Behnke, Olaf
name: Bertolin, Alessandro
name: Bloch, Ingo
name: Brock, Ian
name: Brook, Nick
name: Brugnera, Riccardo
name: Bruni, Alessia
name: Bussey, Peter
name: Caldwell, Allen
name: Catterall, Corinna
name: Chwastowski, Janusz
name: Ciborowski, Jacek
name: Ciesielski, Robert
name: Cooper-Sarkar, Amanda
name: Corradi, Massimo
name: Dementiev, Romuald
name: Dusini, Stefano
name: Ferrando, James
name: Floerchinger, Stefan
name: Foster, Brian
name: Gallo-Voss, Elisabetta
name: Gangadharan, Dhevan
name: Garfagnini, Alberto
name: Geiser, Achim
name: Gladilin, Leonid
name: Golubkov, Yury
name: Grzelak, Grzegorz
name: Gwenlan, Claire
name: Hochman, Don
name: Jomhari, Nur Zulaiha
name: Kadenko, Igor Mykolayovuch
name: Karshon, Uri
name: KAUR, PUNEET
name: Klanner, Robert
name: Klein, Uta
name: Korzhavina, Irina
name: Kovalchuk, Nataliia
name: Kuze, Masahiro
name: Levtchenko, Boris
name: Levy, Aharon
name: Loehr, Bernd
name: Lohrmann, Erich
name: Longhin, Andrea
name: Lorkowski, Florian
name: Lukina, Olga
name: Makarenko, Inna
name: Malka, Janusz
name: Masciocchi, Silvia
name: Nagano, Kunihiro
name: Nam, Jae
name: Onderwaater, Jacobus
name: Onishchuk, Yuriy
name: Paul, Ewald
name: Pidhurskyi, Ivan
name: Polini, Alessandro
name: Przybycien, Mariusz
name: Quintero, Amilkar
name: Ruspa, Marta
name: Schneekloth, Uwe
name: Schörner-Sadenius, Thomas
name: Selyuzhenkov, Ilya
name: Shchedrolosiev, Mykyta
name: Shcheglova, Lydia
name: Skillicorn, Ian
name: Slominski, Wojtek
name: Solano, Ada
name: Stanco, Luca
name: Stefaniuk, Nazar
name: Surrow, Bernd
name: Tokushuku, Katsuo
name: Turkot, Oleksii
name: Tymieniecka, Teresa
name: Verbytskyi, Andrii
name: Wan Abdullah, Wan Ahmad Tajuddin
name: Wichmann, Katarzyna
name: Wing, Matthew
name: Yamada, Sakue
name: Yamazaki, Yuji
name: Zarnecki, Aleksander Filip
name: Zenaiev, Oleksandr
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021
Subjects: subject: 530
subject: electron p: deep inelastic scattering
subject: positron p: deep inelastic scattering
subject: deep inelastic scattering: neutral current
subject: hadron: final state
subject: fluctuation: hadronic
subject: correlation: two-particle
subject: charged particle: multiplicity
subject: charged particle: correlation
subject: hadron hadron: interaction
subject: photoproduction
subject: photon
subject: angular distribution: anisotropy
subject: angular correlation: two-particle
subject: collective phenomena
subject: transverse momentum dependence
subject: rapidity dependence
subject: multiplicity: dependence
subject: cumulant expansion
subject: DESY HERA Stor
subject: ZEUS
subject: charged particle: transverse momentum
subject: CERN LHC Coll
subject: Brookhaven RHIC Coll
subject: PYTHIA
subject: elliptic flow
subject: charged particle: rapidity
subject: numerical calculations: Monte Carlo
subject: experimental results
subject: 318 GeV-cms

description: Journal of high energy physics 1-28 (2021).
description: Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity ep scattering at a centre-of-mass energy $\sqrt(s)$ = 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.
description: Published by SISSA, [Trieste]