Khachatryan V.Sirunyan A.M.Tumasyan A.J. KarancsiM. BartókA. MakovecP. RaicsZ. L. TrocsanyiB. UjvariKarancsi János (1987-) (fizikus)Bartók Márton (2024-) (xxx)Makovec Alajos (1987-) (fizikus)Raics Péter (1944-) (fizikus)Trócsányi Zoltán (1961-) (fizikus)Ujvári Balázs (1977-) (Fizikus / PhD)2024-08-212024-08-21Physical Review Letters. -2016 : 17 (2016), p. 1-19. -Phys. Rev. Lett. -0031-90070031-9007https://hdl.handle.net/2437/379123Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of-mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an integrated luminosity of about 270 nb-1. The correlations are studied over a broad range of pseudorapidity (|η|<2.4) and over the full azimuth (φ) as a function of charged particle multiplicity and transverse momentum (pT). In high-multiplicity events, a long-range (|Δη|>2.0), near-side (Δφ≈0) structure emerges in the two-particle Δη-Δφ correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0<pT<2.0 GeV/c and an approximately linear increase with the charged particle multiplicity, with an overall correlation strength similar to that found in earlier pp data at s=7 TeV. The present measurement extends the study of near-side long-range correlations up to charged particle multiplicities Nch∼180, a region so far unexplored in pp collisions. The observed long-range correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.idegen nyelvű folyóiratközlemény külföldi lapbanA-centerAngular correlationsCenter-of-mass energiesCentre-of-mass energiesCharged particle multiplicitiesCMS detectorsIntegrated luminosityLong range correlationsMeasurements ofTwo particlesopen access journalopen access articlehttps://ebib.lib.unideb.hu/ebib/CorvinaWeb?action=cclfind&resultview=long&ccltext=idno+BIBFORM123411American Physical SocietyCERN10.1103/PhysRevLett.116.1723022024-08-21