Open-charm Euclidean correlators within heavy-meson EFT interactions


The open-charm Euclidean correlators have been computed for the first time using the thermal spectral functions extracted from a finite-temperature self-consistent unitarized approach based on a chiral effective field theory that implements heavy-quark spin symmetry. The inclusion of the full-energy dependent open-charm spectral functions in the calculation of the Euclidean correlators leads to a similar behaviour as the one obtained in lattice QCD for temperatures well below the transition deconfinement temperature. The discrepancies at temperatures close or above the transition deconfinement temperature could indicate that higher-energy states, that are not present in the open-charm spectral functions, become relevant for a quantitative description of the lattice QCD correlators at those temperatures. In fact, we find that the inclusion of a continuum of scattering states improves the comparison at small Euclidean times, whereas differences still arise for large times.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The data used in this paper are available upon request via email.]


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    Note that the lattice correlators we used here are not continuum extrapolated and therefore suffer from cut-off effects at small \(\tau \lesssim 0.1~\text {fm}\).


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The authors thank J.I. Skullerud and A. Rothkopf for kindly providing the lattice QCD data. G.M. and A.R. acknowledge support from the Spanish Ministerio de Economía y Competitividad (MINECO) under the project MDM-2014-0369 of ICCUB (Unidad de Excelencia “María de Maeztu”), and, with additional European FEDER funds, under the contract FIS2017-87534-P. G.M. also acknowledges support from the FPU17/04910 Doctoral Grant from the Spanish Ministerio de Educación, Cultura y Deporte and from a STSM Grant from THOR COST Action CA15213. L.T. acknowledges support from the FPA2016-81114-P Grant from the former Ministerio de Ciencia, Innovación y Universidades, the PID2019-110165GB-I00 Grant from the Ministerio de Ciencia e Innovación, the Heisenberg Programme of the Deutsche Forschungsgemeinschaft (DFG, German research Foundation) under the Project Nr. 383452331 and Nr. 411563442 (Hot Heavy Mesons), and the THOR COST Action CA15213. L.T. and O.K. acknowledge support from the DFG through the Grant Nr. 315477589 - TRR 211 (Strong-interaction matter under extreme conditions). We also thank the EU STRONG-2020 project under the program H2020-INFRAIA-2018-1, grant agreement no. 824093.

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Correspondence to Glòria Montaña.

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Communicated by Ralf Rapp.

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Montaña, G., Kaczmarek, O., Tolos, L. et al. Open-charm Euclidean correlators within heavy-meson EFT interactions. Eur. Phys. J. A 56, 294 (2020).

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