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<p>We calculate the temperature dependence of bottomonium correlators in (2+1)-flavor lattice QCD with the aim to constrain in-medium properties of bottomonia at high temperature. The lattice calculations are performed using HISQ action with physical strange quark mass and light quark masses twenty times smaller than the strange quark mass at two lattice spacings <i>a</i> = 0<i>.</i>0493 fm and 0<i>.</i>0602 fm, and temporal extents <i>N</i><sub><i>τ</i></sub> = 16 − 30, corresponding to the temperatures <i>T</i> = 133 − 250 MeV. We use a tadpole-improved NRQCD action including spin-dependent <i>v</i><sup>6</sup> corrections for the heavy quarks and extended meson operators in order to be sensitive to in-medium properties of the bottomonium states of interest. We find that within estimated errors the bottomonium masses do not change compared to their vacuum values for all temperatures under our consideration; however, we find different nonzero widths for the various bottomonium states.</p>

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In-medium bottomonium properties from lattice NRQCD calculations with extended meson operators

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  • 发表日期：

    2025年5月16日

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  • Heng-Tong Ding,
  • Wei-Ping Huang,
  • Rasmus Larsen,
  • Stefan Meinel,
  • Swagato Mukherjee,
  • Peter Petreczky,
  • Zhanduo Tang

摘要

We calculate the temperature dependence of bottomonium correlators in (2+1)-flavor lattice QCD with the aim to constrain in-medium properties of bottomonia at high temperature. The lattice calculations are performed using HISQ action with physical strange quark mass and light quark masses twenty times smaller than the strange quark mass at two lattice spacings a = 0.0493 fm and 0.0602 fm, and temporal extents Nτ = 16 − 30, corresponding to the temperatures T = 133 − 250 MeV. We use a tadpole-improved NRQCD action including spin-dependent v6 corrections for the heavy quarks and extended meson operators in order to be sensitive to in-medium properties of the bottomonium states of interest. We find that within estimated errors the bottomonium masses do not change compared to their vacuum values for all temperatures under our consideration; however, we find different nonzero widths for the various bottomonium states.