Recent progress on in-medium properties of heavy mesons from finite-temperature EFTs

Frontiers in Physics

Physics

Àngels Ramos¹  Juan M. Torres-Rincon¹  Glòria Montaña²  Laura Tolos³ 

[1] Departament de Física Quàntica i Astrofísica, Facultat de Física, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, Barcelona, Spain;Departament de Física Quàntica i Astrofísica, Facultat de Física, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, Barcelona, Spain;Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, VA, United States;Institute of Space Sciences (ICE-CSIC), Barcelona, Spain;Institut d’Estudis Espacials de Catalunya (IEEC), Barcelona, Spain;Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany;

关键词: effective hadron theories;    chiral symmetry;    heavy-quark spin-flavor symmetry;    D mesons;    B mesons;    finite temperature;    transport coefficients;   

DOI  :  10.3389/fphy.2023.1250939

 received in 2023-06-30, accepted in 2023-08-07,  发布年份 2023

来源: Frontiers

【 摘 要 】

Mesons with heavy flavor content are an exceptional probe of the hot QCD medium produced in heavy-ion collisions. In the past few years, significant progress has been made toward describing the modification of the properties of heavy mesons in the hadronic phase at finite temperature. Ground-state and excited-state thermal spectral properties can be computed within a self-consistent many-body approach that employs appropriate hadron-hadron effective interactions, providing a unique opportunity to confront hadronic Effective Field Theory predictions with recent and forthcoming lattice QCD simulations and experimental data. In this article, we revisit the application of the imaginary-time formalism to extend the calculation of unitarized scattering amplitudes from the vacuum to finite temperature. These methods allow us to obtain the ground-state thermal spectral functions. The thermal properties of the excited states that are dynamically generated within the molecular picture are also directly accessible. We present here the results of this approach for the open-charm and open-bottom sectors. We also analyze how the heavy-flavor transport properties, which are strongly correlated to experimental observables in heavy-ion collisions, are modified in hot matter. In particular, transport coefficients can be computed using an off-shell kinetic theory that is fully consistent with the effective theory describing the scattering processes. The results of this procedure for both charm and bottom transport coefficients are briefly discussed.

【 授权许可】

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Copyright © 2023 Montaña, Ramos, Tolos and Torres-Rincon.