Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb-Pb collisions at root s(NN)=2.76 TeV

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dc.contributor.author The ALICE collaboration
dc.contributor.author Acharya, S.
dc.contributor.author Brucken, E. J.
dc.contributor.author Chang, B.
dc.contributor.author Kim, D. J.
dc.contributor.author Litichevskyi, V.
dc.contributor.author Mieskolainen, M. M.
dc.contributor.author Orava, R.
dc.contributor.author Rak, J.
dc.contributor.author Räsänen, S. S.
dc.contributor.author Saarinen, S.
dc.contributor.author Snellman, T. W.
dc.contributor.author Trzaska, W. H.
dc.contributor.author Viinikainen, J.
dc.date.accessioned 2018-05-09T09:22:01Z
dc.date.available 2018-05-09T09:22:01Z
dc.date.issued 2018-02-10
dc.identifier.citation The ALICE Collaboration , Acharya , S , Brucken , E J , Chang , B , Kim , D J , Litichevskyi , V , Mieskolainen , M M , Orava , R , Rak , J , Räsänen , S S , Saarinen , S , Snellman , T W , Trzaska , W H & Viinikainen , J 2018 , ' Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb-Pb collisions at root s(NN)=2.76 TeV ' , Physics Letters B , vol. 777 , pp. 151-162 . https://doi.org/10.1016/j.physletb.2017.12.021
dc.identifier.other PURE: 106399010
dc.identifier.other PURE UUID: 0a17d273-ee43-4829-b3cb-5b7e14b1a767
dc.identifier.other WOS: 000423930700017
dc.identifier.other Scopus: 85040798759
dc.identifier.other ORCID: /0000-0003-2530-4265/work/44718165
dc.identifier.other ORCID: /0000-0001-8893-7401/work/48397208
dc.identifier.other ORCID: /0000-0002-2574-241X/work/44718203
dc.identifier.uri http://hdl.handle.net/10138/234753
dc.description.abstract In ultrarelativistic heavy-ion collisions, the event-by-event variation of the elliptic flow v(2) reflects fluctuations in the shape of the initial state of the system. This allows to select events with the same centrality but different initial geometry. This selection technique, Event Shape Engineering, has been used in the analysis of charge-dependent two-and three-particle correlations in Pb-Pb collisions at root s(NN) = 2.76 TeV. The two-particle correlator <cos(phi(alpha) - phi(ss))>, calculated for different combinations of charges alpha and beta, is almost independent of v(2) (for a given centrality), while the three-particle correlator <cos(phi(alpha) + phi(beta) - 2 Psi(2))> scales almost linearly both with the event v(2) and charged-particle pseudorapidity density. The charge dependence of the three-particle correlator is often interpreted as evidence for the Chiral Magnetic Effect (CME), a parity violating effect of the strong interaction. However, its measured dependence on v(2) points to a large non-CME contribution to the correlator. Comparing the results with Monte Carlo calculations including a magnetic field due to the spectators, the upper limit of the CME signal contribution to the three-particle correlator in the 10-50% centrality interval is found to be 26-33% at 95% confidence level. (c) 2017 The Author(s). Published by Elsevier B.V. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Physics Letters B
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject RELATIVISTIC NUCLEAR COLLISIONS
dc.subject HEAVY-ION COLLISIONS
dc.subject PARITY VIOLATION
dc.subject HOT QCD
dc.subject FLOW
dc.subject 114 Physical sciences
dc.title Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb-Pb collisions at root s(NN)=2.76 TeV en
dc.type Article
dc.contributor.organization Helsinki Institute of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.physletb.2017.12.021
dc.relation.issn 0370-2693
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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