Charge-dependent azimuthal correlations in pPb collisions with CMS experiment

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dc.citation.firstpage744en_US
dc.citation.journalTitleNuclear Physics Aen_US
dc.citation.lastpage747en_US
dc.citation.volumeNumber967en_US
dc.contributor.authorCMS Collaborationen_US
dc.date.accessioned2018-12-03T18:42:10Zen_US
dc.date.available2018-12-03T18:42:10Zen_US
dc.date.issued2017en_US
dc.description.abstractCharge-dependent azimuthal correlations relative to the event plane in AA collisions have been suggested as providing evidence for the chiral magnetic effect (CME) caused by local strong parity violation. However, the observation of the CME remains inconclusive because of several possible sources of background correlations that may account for part or all of the observed signals. This talk will present the first application of three-particle, charge-dependent azimuthal correlation analysis in proton-nucleus collisions, using pPb data collected with the CMS experiment at the LHC at SNN=5.02 TeV. The differences found in comparing same and opposite sign correlations are studied as a function of event multiplicity and the pseudorapidity gap between two of the particles detected in the CMS tracker detector. After selecting events with comparable charge-particle multiplicities, the results for pPb collisions are found to be similar to those for PbPb collisions collected at the same collision energy. With a reduced magnetic field strength and a random field orientation in high multiplicity pPb events, the CME contribution to any charge separation signal is expected to be much smaller than found in peripheral PbPb events. These results pose a challenge for the interpretation of charge-dependent azimuthal correlations in heavy ion collisions in terms of the chiral magnetic effect.en_US
dc.identifier.citationCMS Collaboration. "Charge-dependent azimuthal correlations in pPb collisions with CMS experiment." <i>Nuclear Physics A,</i> 967, (2017) Elsevier: 744-747. https://doi.org/10.1016/j.nuclphysa.2017.05.089.en_US
dc.identifier.doihttps://doi.org/10.1016/j.nuclphysa.2017.05.089en_US
dc.identifier.urihttps://hdl.handle.net/1911/103760en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordheavy ion physicsen_US
dc.subject.keywordsmall systemsen_US
dc.subject.keywordchiral magnetic effecten_US
dc.subject.keywordlocal parity violationen_US
dc.titleCharge-dependent azimuthal correlations in pPb collisions with CMS experimenten_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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