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Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/ c in PbPb collisions at $\sqrt {s}_{{NN}}$=5.02 TeV

2018-01-10Journal article Open access
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dc.contributor.authorCMS collaboration (2229 authors)
dc.contributor.authorNayak, Aruna
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorCalpas, Betty
dc.contributor.authorDi Francesco, Agostino
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorHollar, Jonathan
dc.contributor.authorLeonardo, Nuno
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSeixas, Joao
dc.contributor.authorToldaiev, Oleksii
dc.contributor.authorVadruccio, Daniele
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorSilva, Pedro
dc.contributor.authorMusella, Pasquale
dc.contributor.authorPela, Joao
dc.date.accessioned2019-02-04T12:16:51Z
dc.date.available2019-02-04T12:16:51Z
dc.date.issued2018-01-10
dc.date.updated2019-02-04T12:16:51Z
dc.description.abstractThe Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1<pT<100 GeV/c . The analysis focuses on the pT>10 GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60% most central events. The v2 coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from both methods remain positive up to pT∼60–80 GeV/c , in all examined centrality classes. The v3 coefficient, only measured with the scalar product method, tends to zero for pT≳20 GeV/c . Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations.
dc.description.versionPeer Reviewed
dc.identifierPhys.Lett. B776 (2018) 195-216; DOI 10.1016/j.physletb.2017.11.041
dc.identifier.urihttp://dx.doi.org/10.1016/j.physletb.2017.11.041
dc.identifier.urihttp://hdl.handle.net/10400.26/27279
dc.language.isoeng
dc.titleAzimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/ c in PbPb collisions at $\sqrt {s}_{{NN}}$=5.02 TeV
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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