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Hard Probes 2018: International Conference on Hard & Electromagnetic Probes of High-Energy Nuclear Collisions

30 September 2018 to 5 October 2018
Aix-Les-Bains, Savoie, France
Europe/Zurich timezone
PROCEEDINGS OPEN UNTIL DECEMBER 15th 2018

Quenching of Hadron Spectra in Heavy Ion Collisions at the LHC

2 Oct 2018, 10:00
20m
Aix-Les-Bains, Savoie, France

Aix-Les-Bains, Savoie, France

Aix-Les-Bains, Congress Center Student Lectures Day: September 30 at CERN
2a) Jets and high-pT hadrons (TALK)

Speaker

Francois Arleo (Laboratoire Leprince-Ringuet)

Description

The $p_\perp$ dependence of the nuclear modification factor $R_{AA}$ measured in PbPb collisions at the LHC exhibits a universal shape, which can be very well reproduced in a simple energy loss model based on the BDMPS medium-induced gluon spectrum. The scaling is observed for various hadron species ($h^\pm$, D, $J/\psi$) in different centrality classes and at both colliding energies, √s=2.76 TeV and √s=5.02 TeV. Results indicate an 10-20% increase of the transport coefficient from √s=2.76 TeV to √s=5.02 TeV, consistent with that of particle multiplicity. Based on this model, a data-driven procedure is suggested, which allows for the determination of the first and second moments of the quenching weight without any prior knowledge of the latter.

Primary author

Francois Arleo (Laboratoire Leprince-Ringuet)