Image de couverture de livre

Evolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at √sNN=2.76TeV

Afficher d'autres versions (266)

In two-particle angular correlation measurements, jets give rise to a near-side peak, formed by particles associated to a higher-pT trigger particle. Measurements of these correlations as a function of pseudorapidity (Δη) and azimuthal (Δφ) differences are used to extract the centrality and pT depen...

Description complète

Enregistré dans:
Détails bibliographiques
Auteurs principaux: Acharya, Shreyasi (Auteur) , Angelov, Venelin (Auteur) , Arslandok, Mesut (Auteur) , Danisch, Meike (Auteur) , Deisting, Alexander (Auteur) , Glässel, Peter (Auteur) , Kim, Jiyoung (Auteur) , Klewin, Sebastian (Auteur) , Leardini, Lucia (Auteur) , Mercado Pérez, Jorge (Auteur) , Oeschler, Helmut (Auteur) , Ohlson, Alice (Auteur) , Pachmayer, Yvonne C. (Auteur) , Reygers, Klaus (Auteur) , Schicker, Rainer (Auteur) , Schmidt, Marten Ole (Auteur) , Stachel, Johanna (Auteur) , Weiser, Dennis (Auteur) , Wilkinson, Jeremy (Auteur) , Windelband, Bernd (Auteur) , Zimmermann, Alice (Auteur)
Collectivité auteur: ALICE (Auteur)
Format: Article (Journal)
Langue:anglais
Publié: 8 September 2017
In: Physical review
Year: 2017, Volume: 96, Numéro: 3
ISSN:2469-9993
DOI:10.1103/PhysRevC.96.034904
Accès en ligne:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevC.96.034904
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.96.034904
Accéder au texte intégral
Notes sur l'auteur:J. Adam et al.* (ALICE Collaboration)
Description
Résumé:In two-particle angular correlation measurements, jets give rise to a near-side peak, formed by particles associated to a higher-pT trigger particle. Measurements of these correlations as a function of pseudorapidity (Δη) and azimuthal (Δφ) differences are used to extract the centrality and pT dependence of the shape of the near-side peak in the pT range 1<pT<8 GeV/c in Pb-Pb and pp collisions at √sNN = 2.76 TeV. A combined fit of the near-side peak and long-range correlations is applied to the data and the peak shape is quantified by the variance of the distributions. While the width of the peak in the Δφ direction is almost independent of centrality, a significant broadening in the Δη direction is found from peripheral to central collisions. This feature is prominent for the low-pT region and vanishes above 4 GeV/c. The widths measured in peripheral collisions are equal to those in pp collisions in the Δφ direction and above 3 GeV/c in the Δη direction. Furthermore, for the 10% most central collisions and 1<pT,assoc< 2 GeV/c, 1<pT,trig< 3 GeV/c, a departure from a Gaussian shape is found: a depletion develops around the center of the peak. The results are compared to A Multi-Phase Transport (AMPT) model simulation as well as other theoretical calculations indicating that the broadening and the development of the depletion are connected to the strength of radial and longitudinal flow.
Description:Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt
ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, A. Deisting, P. Glässel, J. Kim, S. Klewin, L. Leardini, J. Mercado Pérez, H. Oeschler, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, J. Stachel, D.F. Weiser, J. Wilkinson, B. Windelband, A. Zimmermann [und weitere]
Gesehen am 15.10.2018
Description matérielle:Online Resource
ISSN:2469-9993
DOI:10.1103/PhysRevC.96.034904

Documents similaires