Jet quenching as a probe of the initial stages in heavy-ion collisions
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, 803, Article 135318. https://doi.org/10.1016/j.physletb.2020.135318
Published inPhysics Letters B
© 2020 The Author(s)
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, , and the high- azimuthal asymmetries, , 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.
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Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingWe acknowledge helpful discussions with J. Noronha-Hostler, computational resources from the CSC-IT Center for Science in Espoo, Finland, and financial support by the US DOE (CA, contract DEAC05-06OR23177 under which Jefferson Science Associates, LLC operates Jefferson Lab), the Academy of Finland (HN, project 297058), the ERC (RP, grant no. 725369), MICINN of Spain (NA, CAS, project FPA2017-83814-P and Unidad de Excelencia María de Maetzu MDM-2016-069), Xunta de Galicia (NA, CAS, Consellería de Educación) and FEDER (NA, CAS). This work has been performed within COST Action CA15213 THOR. ...
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