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  • Letter

Early evolution constrained by high-p⊥ quark-gluon plasma tomography

Stefan Stojku1, Jussi Auvinen1, Marko Djordjevic2, Pasi Huovinen1,*, and Magdalena Djordjevic1,†

  • 1Institute of Physics Belgrade, National Institute of the Republic of Serbia, University of Belgrade, Serbia
  • 2Faculty of Biology, University of Belgrade, Serbia

  • *pasi@ipb.ac.rs
  • †magda@ipb.ac.rs
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Phys. Rev. C 105, L021901 – Published 16 February, 2022

DOI: https://doi.org/10.1103/PhysRevC.105.L021901

Abstract

We show that high-p⊥RAA and v2 are sensitive to the early expansion dynamics, and that the high-p⊥ observables prefer delayed onset of energy loss and transverse expansion. To calculate high-p⊥RAA and v2, we employ our newly developed DREENA-A framework, which combines state-of-the-art dynamical energy loss model with (3+1)-dimensional hydrodynamical simulations. The model applies to both light and heavy flavor, and we predict a larger sensitivity of heavy flavor observables to the onset of transverse expansion. This presents the first time when bulk QGP behavior has been constrained by high-p⊥ observables and related theory, i.e., by so-called QGP tomography.

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Phys. Rev. C 105, L021901– Published 16 February, 2022
  • Received 19 August 2020
  • Revised 24 July 2021
  • Accepted 25 January 2022
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