Measurements of long-range near-side angular correlations in √sNN=5TeV proton-lead collisions in the forward region



Aaij, R, Beteta, C Abellan, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M
et al (show 726 more authors) (2016) Measurements of long-range near-side angular correlations in √sNN=5TeV proton-lead collisions in the forward region. PHYSICS LETTERS B, 762. pp. 473-483.

[thumbnail of 1512.00439v1.pdf] Text
1512.00439v1.pdf - Author Accepted Manuscript

Download (870kB)

Abstract

Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\text{NN}}}=5$TeV, collected with the LHCb detector at the LHC. The analysis is based on data recorded in two beam configurations, in which either the direction of the proton or that of the lead ion is analysed. The correlations are measured in the laboratory system as a function of relative pseudorapidity, $\Delta\eta$, and relative azimuthal angle, $\Delta\phi$, for events in different classes of event activity and for different bins of particle transverse momentum. In high-activity events a long-range correlation on the near side, $\Delta\phi \approx 0$, is observed in the pseudorapidity range $2.0<\eta<4.9$. This measurement of long-range correlations on the near side in proton-lead collisions extends previous observations into the forward region up to $\eta=4.9$. The correlation increases with growing event activity and is found to be more pronounced in the direction of the lead beam. However, the correlation in the direction of the lead and proton beams are found to be compatible when comparing events with similar absolute activity in the direction analysed.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-040.html
Uncontrolled Keywords: nucl-ex, nucl-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 04 Nov 2016 15:09
Last Modified: 12 Oct 2023 03:47
DOI: 10.1016/j.physletb.2016.09.064
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3004375