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    Bayesian study of relativistic open and hidden charm in anisotropic lattice QCD


    Kelly, Aoife and Rothkop, Alexander and Skullerud, Jon-Ivar (2018) Bayesian study of relativistic open and hidden charm in anisotropic lattice QCD. Physical Review D, 97. p. 114509. ISSN 1550-7998

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    Abstract

    We present the first combined study of correlators and spectral properties of charmonium and open charm mesons at finite temperature using a fully relativistic lattice QCD approach. The QCD medium is captured by second generation anisotropic 243×Nτ lattices from the FASTSUM Collaboration, including 2+1 flavors of clover discretized quarks with mπ≈380  MeV. Two Bayesian methods are deployed to reconstruct the spectral functions, the recent Bayesian reconstruction (BR) method as well as the maximum entropy method with Fourier basis. We take particular care to disentangle genuine in-medium effects from method artifacts with the help of the reconstructed correlator. Consistent with the direct inspection of correlators, we observe no significant in-medium modification for J/Ψ and ηc around the crossover, while the χc states on the other hand show clear changes around the transition. At the highest temperature, T=352  MeV, J/Ψ and ηc also exhibit discernible changes compared to the vacuum. For D mesons around Tc, no significant modifications are observed, but we find clear indications that no bound state survives at the highest temperature of T=352  MeV. Above Tc we discover a significant difference between D and D∗ mesons, the latter being much more strongly affected by the medium.

    Item Type: Article
    Additional Information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
    Keywords: Bayesian study; relativistic; open; hidden charm; anisotropic lattice; QCD;
    Academic Unit: Faculty of Science and Engineering > Theoretical Physics
    Item ID: 13071
    Identification Number: https://doi.org/10.1103/PhysRevD.97.114509
    Depositing User: Dr. Jonivar Skullerud
    Date Deposited: 18 Jun 2020 16:41
    Journal or Publication Title: Physical Review D
    Publisher: American Physical Society
    Refereed: Yes
    Funders: SCOAP3
    URI:

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