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    Ab initio calculation of finite-temperature charmonium potentials


    Evans, P.W.M. and Allton, C.R. and Skullerud, Jon-Ivar (2014) Ab initio calculation of finite-temperature charmonium potentials. Physical Review D, 89 (071502). pp. 1-5. ISSN 1550-7998

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    Abstract

    The interquark potential in charmonium states is calculated in both the zero and nonzero temperature phases from a first-principles lattice QCD calculation. Simulations with two dynamical quark flavors are used with temperatures T in the range 0.4Tc ≲ T ≲ 1.7Tc, where Tc is the deconfining temperature. The correlators of point-split operators are analyzed to gain spatial information about the charmonium states. A method introduced by the HAL QCD Collaboration and based on the Schrödinger equation is applied to obtain the interquark potential. We find a clear temperature dependence with the central potential agreeing with the Cornell potential in the confined phase and becoming flatter (more screened) as the temperature increases past the deconfining temperature. This is the first time the interquark potential has been calculated for realistic quarks at finite temperature.

    Item Type: Article
    Additional Information: We acknowledge the support and infrastructure provided by the Trinity Centre for High Performance Computing and the IITAC project funded by the HEA under the Program for Research in Third Level Institutes (PRTLI) co-funded by the Irish Government and the European Union. The calculations have been carried out using CHROMA [31]. The work of C. R. A. and P.W. M. E. was carried out as part of the UKQCD Collaboration and the DiRAC Facility jointly funded by STFC, the Large Facilities Capital Fund of BIS and Swansea University. P.W.M. E. and C. R. A. are supported by STFC. C. R. A. thanks the Galileo Galilei Institute for Theoretical Physics for hospitality and the INFN for support during the writing of this work. We are very grateful to Gert Aarts, Sinya Aoki, Robert Edwards, Tetsuo Hatsuda, Balint Joó and Alexander Rothkopf for useful discussions.
    Keywords: Ab initio calculation; finite-temperature; charmonium potentials; lattice QCD calculation;
    Academic Unit: Faculty of Science and Engineering > Mathematical Physics
    Item ID: 5643
    Identification Number: https://doi.org/10.1103/PhysRevD.89.071502
    Depositing User: Dr. Jonivar Skullerud
    Date Deposited: 05 Jan 2015 17:09
    Journal or Publication Title: Physical Review D
    Publisher: American Physical Society
    Refereed: Yes
    Funders: Higher Education Authority
    URI:

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