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Anisotropic excited bottomonia from a basis of smeared operators

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arxiv 2502.03185 v1 pith:M5JTAYKD submitted 2025-02-05 hep-lat

Ryan Bignell , Gert Aarts , Chris Allton , M. Naeem Anwar , Timothy J. Burns , Rachel Horohan D'arcy , Benjamin Jäger , Seyong Kim
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Maria Paola Lombardo Sinéad Ryan Jon-Ivar Skullerud Antonio Smecca
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keywords temperaturebottomoniaanisotropicapproachbasisfiniteoperatorssmeared
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abstract

Bottomonia play a crucial role in our understanding of the quark gluon plasma. We present lattice non-relativistic QCD calculations of bottomonia at temperatures in the range $T \in [47, 380]$ MeV using the Fastsum Generation 2L anisotropic $N_f = 2 + 1$ ensembles. The use of a basis of smeared operators allows the extraction of excited-state masses at zero temperature and an investigation of their thermal properties at non-zero temperature. We find that the ground state signal is substantially improved by this variational approach at finite temperature. We also apply the time-derivative moments approach to the projected or optimal correlation functions at finite temperature.

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  1. Finite temperature hadronic spectral properties

    hep-lat 2025-05 conditional novelty 5.0 of 10

    Doubly charmed baryons stay stable and the bottomonium ground state loses 30 to 40 MeV as quark-gluon plasma temperature rises, according to new lattice QCD ensembles.

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