Abstract

The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb–Pb collisions at sort(s) = 2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15<pT<50 GeV/c for nine centrality intervals from 70–80% to 0–5%. The results in Pb–Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0–5%) with RAA≈0.13 at pT=6–7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70–80%), only moderate suppression (RAA=0.6–0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.

Autore Pugliese

• Di Bari Domenico , Fiore Enrichetta Maria , Volpe Giacomo

Tutti gli autori

• MASTROSERIO A.;DI BARI D.;FIORE E.M.;VOLPE G.;BRUNO G.E.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2013

ISSN

0370-2693

ISBN

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Numero di citazioni Wos

200

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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