In-medium dispersion relations of charmonia studied by the maximum entropy method

Atsuro Ikeda, Masayuki Asakawa, and Masakiyo Kitazawa
Phys. Rev. D 95, 014504 – Published 10 January 2017

Abstract

We study in-medium spectral properties of charmonia in the vector and pseudoscalar channels at nonzero momenta on quenched lattices, especially focusing on their dispersion relation and the weight of the peak. We measure the lattice Euclidean correlation functions with nonzero momenta on the anisotropic quenched lattices and study the spectral functions with the maximum entropy method. The dispersion relations of charmonia and the momentum dependence of the weight of the peak are analyzed with the maximum entropy method together with the errors estimated probabilistically in this method. We find a significant increase of the masses of charmonia in medium. We also find that the functional form of the charmonium dispersion relations is not changed from that in the vacuum within the error even at T1.6Tc for all the channels we analyze.

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  • Received 26 October 2016

DOI:https://doi.org/10.1103/PhysRevD.95.014504

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear Physics

Authors & Affiliations

Atsuro Ikeda* and Masayuki Asakawa

  • Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan

Masakiyo Kitazawa

  • Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan and J-PARC Branch, KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan

  • *a-ikeda@kern.phys.sci.osaka-u.ac.jp
  • yuki@phys.sci.osaka-u.ac.jp
  • kitazawa@phys.sci.osaka-u.ac.jp

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Issue

Vol. 95, Iss. 1 — 1 January 2017

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