Probing spectral properties of the QGP with real-time lattice simulations
Boguslavski, K.; Kurkela, A.; Lappi, T. Peuron, J. (2019). Probing spectral properties of the QGP with real-time lattice simulations. In d'Enterria, David; Morsch, Andreas; Crochet, Philippe (Eds.) Hard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, POS Proceedings of Science, 345. Sissa Medialab srl, 057. DOI: 10.22323/1.345.0057
Published inPOS Proceedings of Science
© The Authors, 2019
We present a new method to obtain spectral properties of a non-Abelian gauge theory in the region where occupation numbers are high. The method to measure the (single-particle) spectral function is based on linear response theory and classical-statistical lattice simulations. Although we apply it to a system far from equilibrium in a self-similar regime, the extracted spectral function can be understood within the hard thermal loop (HTL) formalism and can thus be connected to thermal equilibrium at high temperatures. This allows us to obtain quantities like the lifetime of quasiparticles that are beyond the leading order and difficult to compute within HTL. The approach has the potential to measure transport coefficients, to study the earliest stages of heavy-ion collisions in a controlled way and it can be employed beyond the range of validity of HTL.
PublisherSissa Medialab srl
ConferenceInternational Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions
Is part of publicationHard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions
Publication in research information system
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Related funder(s)Academy of Finland; European Commission
Funding program(s)Research post as Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingT. L. is supported by the Academy of Finland, projects No. 267321 and No. 303756. This work is supported by the European Research Council, grant ERC-2015-CoG-681707. J. P. is supported by the Jenny and AnttiWihuri Foundation. J. P. acknowledges support for travel from Magnus Ehrnrooth foundation.
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