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Spectral properties of bottomonium at high temperature: a systematic investigation

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arxiv 2503.17315 v1 pith:VYAEZO4T submitted 2025-03-21 hep-lat hep-ph

Jon-Ivar Skullerud , Gert Aarts , Chris Allton , M. Naeem Anwar , Ryan Bignell , Timothy J. Burns , Rachel Horohan D'arcy , Benjamin Jäger
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Seyong Kim Maria Paola Lombardo Ben Page Sinéad M. Ryan Antonio Smecca Tom Spriggs
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keywords methodsspectralbottomoniumfeatureshighstatetemperatureanalyses
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We investigate spectral features of bottomonium at high temperature, in particular the thermal mass shift and width of ground state S-wave and P-wave state. We employ and compare a range of methods for determining these features from lattice NRQCD correlators, including direct correlator analyses (multi-exponential fits and moments of spectral functions), linear methods (Backus-Gilbert, Tikhonov and HLT methods), and Bayesian methods for spectral function reconstruction (MEM and BR). We comment on the reliability and limitations of the various methods.

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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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