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

• Verfasst von: Kelly, Aoife [VerfasserIn]
• Verfasst von: Rothkopf, Alexander [VerfasserIn]
• Verfasst von: Skullerud, Jon Ivar [VerfasserIn]
• Titel: Bayesian study of relativistic open and hidden charm in anisotropic lattice QCD
• Verf.angabe: Aoife Kelly, Alexander Rothkopf, and Jon-Ivar Skullerud
• E-Jahr: 2018
• Jahr: 2 Feb 2018
• Umfang: 18 S.
• Fussnoten: Gesehen am 15.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1802.00667, 18 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: Nuclear Theory
• Sach-SW: High Energy Physics - Lattice
• K10plus-PPN: 1570669333

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 24^3xN_t lattices from the FASTSUM collaboration, including 2+1 flavors of clover discretized quarks with m_pi~380 MeV. Two Bayesian methods are deployed to reconstruct the spectral functions, the recent 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/Psi and eta_c around the crossover, while the chi_c states on the other hand show clear changes around the transition. At the highest temperature, T=352 MeV, J/Psi and eta_c also exhibit discernible changes compared to the vacuum. For D mesons around $T_c$, no significant modifications are observed, but we find clear indications that no bound state survives at the highest temperature of T=352 MeV. Above T_c we discover a significant difference between D and D* mesons, the latter being much more strongly affected by the medium.