Jet-like near-side peak shapes in Pb–Pb collisions at √ sNN = 2.76 TeV with ALICE

Morsch, A. and Abelev, B. and Adam, J. and Adamová, D. and Adare, A. M. and Aggarwal, M. M. and Agnello, M. and Agócs, András and Agostinelli, A. and Ahammed, Z. and Ahmad, Masoodi A. and Ahmad, N. and Ahn, S. A. and Ahn, S. U. and Ajaz, M. and Akindinov, A. and Alaniz, E. C. and Aleksandrov, D. and Alessandro, B. and Alici, A. and Alkin, A. and Alme, J. and Alt, T. and Altini, V. and Altinpinar, S. and Altsybeev, I. and Andrei, C. and Andronic, A. and Anguelov, V. and Anielski, J. and Barnaföldi, Gergely Gábor and Bencédi, Gyula and Berényi, Dániel and Boldizsár, László and Dénes, Ervin and Hamar, Gergő and Lévai, Péter and Pochybova, Sona (2013) Jet-like near-side peak shapes in Pb–Pb collisions at √ sNN = 2.76 TeV with ALICE. NUCLEAR PHYSICS A, 910-91. pp. 281-284. ISSN 0375-9474

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Abstract

We present preliminary results from di-hadron correlations in azimuth (ϕ) and pseudo-rapidity (η) induced by hadronic di-jets produced in Pb–Pb collisions at √ sNN = 2.76 TeV. The jet-like near-side peak has been isolated from η-independent collective flow correlations using a η-gap method and its shape has been characterized by rms and excess kurtosis. These quantities have been studied as a function of centrality as well as of trigger (associated) particle transverse momentum ranging from 2−8 GeV/c (1−3 GeV/c). We observe that the rms in ∆η increases with the centrality of the collisions whereas the rms in ∆ϕ stays constant within experimental uncertainties.

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