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Title: Two-particle azimuthal correlations in γp interactions using pPb collisions at √ s <inf>NN</inf> = 8.16 TeV
Other Titles: Two-particle azimuthal correlations in $γ$p interactions using pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV
Authors: Tumasyan, A
Adam, W
Bergauer, T
Dragicevic, M
Escalante Del Valle, A
Frühwirth, R
Jeitler, M
Krammer, N
Lechner, L
Liko, D
Mikulec, I
Vit, M
Bethani, A
Bruno, G
Bury, F
Caputo, C
David, P
Delaere, C
Delcourt, M
Donertas, IS
Giammanco, A
Lemaitre, V
Mondal, K
Prisciandaro, J
Taliercio, A
Teklishyn, M
Vischia, P
Wertz, S
Wuyckens, S
Alves, GA
Reid, ID
Hensel, C
Moraes, A
Aldá Júnior, WL
Kyberd, P
Belchior Batista Das Chagas, E
Brandao Malbouisson, H
Khan, A
Carvalho, W
Cole, JE
Coldham, K
Pitters, FM
Rad, N
Schieck, J
Schöfbeck, R
Spanring, M
Templ, S
Waltenberger, W
Wulz, CE
Zarucki, M
Darwish, MR
De Wolf, EA
Janssen, T
Kello, T
Lelek, A
Pieters, M
Rejeb Sfar, H
Van Mechelen, P
Van Putte, S
Van Remortel, N
Blekman, F
Bols, ES
Chhibra, SS
D'Hondt, J
De Clercq, J
Lontkovskyi, D
Lowette, S
Marchesini, I
Moortgat, S
Morton, A
Müller, D
Python, Q
Tavernier, S
Van Doninck, W
Van Mulders, P
Beghin, D
Bilin, B
Clerbaux, B
De Lentdecker, G
Dorney, B
Favart, L
Grebenyuk, A
Kalsi, AK
Makarenko, I
Moureaux, L
Pétré, L
Popov, A
Postiau, N
Starling, E
Thomas, L
Vander Velde, C
Vanlaer, P
Vannerom, D
Wezenbeek, L
Cornelis, T
Dobur, D
Gruchala, M
Khvastunov, I
Mestdach, G
Niedziela, M
Roskas, C
Skovpen, K
Tytgat, M
Verbeke, W
Vermassen, B
Keywords: CMS;photon-proton;collectivity
Issue Date: 20-Jul-2023
Publisher: Elsevier
Citation: Tumasyan, A. et al. for the CMS Collaboration (2023) 'Two-particle azimuthal correlations in γp interactions using pPb collisions at √ s <inf>NN</inf> = 8.16 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 844, 137905, pp. 1 - 24. doi: .10.1016/j.physletb.2023.137905.
Abstract: Copyright © 2023 The Author(s). The first measurements of the Fourier coefficients (VnΔ) of the azimuthal distributions of charged hadrons emitted from photon-proton (γp) interactions are presented. The data are extracted from 68.8 nb−1 of ultra-peripheral proton-lead (pPb) collisions at sNN=8.16TeV using the CMS detector. The high energy lead ions produce a flux of photons that can interact with the oncoming proton. This γp 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 VnΔ coefficients are presented in ranges of event multiplicity and transverse momentum (pT) and are compared to corresponding hadronic minimum bias pPb results. For a given multiplicity range, the mean pT of charged particles is smaller in γp than in pPb collisions. For both the γp and pPb samples, V1Δ is negative, V2Δ is positive, and V3Δ consistent with 0. For each multiplicity and pT range, V2Δ is larger for γp events. The γp data are consistent with model predictions that have no collective effects.
Description: Data availability: Complete statement will be provided in proof.
A preprint was made available at arXiv, arXiv:2204.13486 [nucl-ex]. It was replaced with the published version. All the figures and tables can be found at: (CMS Public Pages).
Report number: CMS-HIN-18-008, CERN-EP-2021-100.
ISSN: 0370-2693
Other Identifiers: ORCID iD Joanne E. Cole
ORCID iD: Akram Khan
ORCID iD: Paul Kyberd
ORCID iD: Ivan D. Reid
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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