Jet quenching as a probe of the initial stages in heavy-ion collisions

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http://hdl.handle.net/10138/314165

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Andres , C , Armesto , N , Niemi , H , Paatelainen , R & Salgado , C A 2020 , ' Jet quenching as a probe of the initial stages in heavy-ion collisions ' , Physics Letters B , vol. 803 , 135318 . https://doi.org/10.1016/j.physletb.2020.135318

Title: Jet quenching as a probe of the initial stages in heavy-ion collisions
Author: Andres, Carlota; Armesto, Néstor; Niemi, Harri; Paatelainen, Risto; Salgado, Carlos A.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2020-04-10
Language: eng
Number of pages: 7
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/314165
Abstract: Jet quenching provides a very flexible variety of observables which are sensitive to different energy- and time-scales of the strongly interacting matter created in heavy-ion collisions. Exploiting this versatility would make jet quenching an excellent chronometer of the yoctosecond structure of the evolution process. Here we show, for the first time, that a combination of jet quenching observables is sensitive to the initial stages of heavy-ion collisions, when the approach to local thermal equilibrium is expected to happen. Specifically, we find that in order to reproduce at the same time the inclusive particle production suppression, RAA, and the high-pT azimuthal asymmetries, v2, energy loss must be strongly suppressed for the first ∼0.6 fm. This exploratory analysis shows the potential of jet observables, possibly more sophisticated than the ones studied here, to constrain the dynamics of the initial stages of the evolution.
Subject: ENERGY
FLOW
Heavy-ions
Initial stages
Jet quenching
LEAD COLLISIONS
PB-PB COLLISIONS
PREDICTIONS
ROOT-S(NN)=2.76 TEV
TRANSVERSE-MOMENTUM DEPENDENCE
114 Physical sciences
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