Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/14124
Title: Two-particle azimuthal correlations in γp interactions using pPb collisions at √sNN=8.16 TeV
Authors: Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Del Valle, A. Escalante
Fruehwirth, R.
Jeitler, M.
Keywords: CMS
Photon-proton
Collectivity
Proton-Lead Collisions
Plus Au Collisions
Angular-Correlations
Flow
Particles
Signature
Physics
Side
Publisher: ELSEVIER
Abstract: The first measurements of the Fourier coefficients (V-n Delta) of the azimuthal distributions of charged hadrons emitted from photon-proton (gamma p) interactions are presented. The data are extracted from 68.8nb(-1) of ultra-peripheral proton-lead (pPb) collisions at root s(NN)= 8.16 TeV using the CMS detector. The high energy lead ions produce a flux of photons that can interact with the oncoming proton. This gamma p system provides a set of unique initial conditions with multiplicity lower than in photon-lead collisions but comparable to recent electron-positron and electron-proton data. The V-n Delta coefficients are presented in ranges of event multiplicity and transverse momentum (p(T)) and are compared to corresponding hadronic minimum bias pPb results. For a given multiplicity range, the mean p(T) of charged particles is smaller in gamma p than in pPb collisions. For both the gamma p and pPb samples, V-1 Delta is negative, V-2 Delta is positive, and V-3 Delta consistent with 0. For each multiplicity and p(T) range, V-2 Delta is larger for gamma p events. The gamma p data are consistent with model predictions that have no collective effects. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
URI: https://doi.org/10.1016/j.physletb.2023.137905
https://hdl.handle.net/11147/14124
ISSN: 0370-2693
1873-2445
Appears in Collections:WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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