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dc.contributor.authorAdam, Jaroslavpt_BR
dc.contributor.authorGay Ducati, Maria Beatrizpt_BR
dc.contributor.authorALICE Collaborationpt_BR
dc.date.accessioned2017-11-28T02:29:13Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0031-9007pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/170607pt_BR
dc.description.abstractThe measurement of two-particle angular correlations is a powerful tool to study jet quenching in a pT region inaccessible by direct jet identification. In these measurements pseudorapidity (Δη) and azimuthal (Δφ) differences are used to extract the shape of the near-side peak formed by particles associated with a higher pT trigger particle (1 < pT;trig < 8 GeV=c). A combined fit of the near-side peak and long-range correlations is applied to the data allowing the extraction of the centrality evolution of the peak shape in Pb-Pb collisions at sNN p ¼ 2.76 TeV. A significant broadening of the peak in the Δη direction at low pT is found from peripheral to central collisions, which vanishes above 4 GeV=c, while in the Δφ direction the peak is almost independent of centrality. For the 10% most central collisions and 1 < pT;assoc < 2 GeV=c, 1 < pT;trig < 3 GeV=c a novel feature is observed: a depletion develops around the center of the peak. The results are compared to pp collisions at the same center of mass energy and AMPT model simulations. The comparison to the investigated models suggests that the broadening and the development of the depletion is connected to the strength of radial and longitudinal flow.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review letters. Melville. Vol. 119, no. 10 (Sept. 2017), 102301, 13 p.pt_BR
dc.rightsOpen Accessen
dc.subjectColisao de ions pesadospt_BR
dc.subjectAceleradores de partículaspt_BR
dc.titleAnomalous evolution of the near-side jet peak shape in Pb-Pb collisions at √sNN=2.76 TeVpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001053046pt_BR
dc.type.originEstrangeiropt_BR


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