Spectral properties of bottomonium at high temperature: a systematic investigation
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908277091074048 |
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| author | Skullerud, Jon-Ivar Aarts, Gert Allton, Chris Anwar, M. Naeem Bignell, Ryan Burns, Timothy J. D'arcy, Rachel Horohan Jäger, Benjamin Kim, Seyong Lombardo, Maria Paola Page, Ben Ryan, Sinéad M. Smecca, Antonio Spriggs, Tom |
| author_facet | Skullerud, Jon-Ivar Aarts, Gert Allton, Chris Anwar, M. Naeem Bignell, Ryan Burns, Timothy J. D'arcy, Rachel Horohan Jäger, Benjamin Kim, Seyong Lombardo, Maria Paola Page, Ben Ryan, Sinéad M. Smecca, Antonio Spriggs, Tom |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_17315 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spectral properties of bottomonium at high temperature: a systematic investigation Skullerud, Jon-Ivar Aarts, Gert Allton, Chris Anwar, M. Naeem Bignell, Ryan Burns, Timothy J. D'arcy, Rachel Horohan Jäger, Benjamin Kim, Seyong Lombardo, Maria Paola Page, Ben Ryan, Sinéad M. Smecca, Antonio Spriggs, Tom High Energy Physics - Lattice High Energy Physics - Phenomenology 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. |
| title | Spectral properties of bottomonium at high temperature: a systematic investigation |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.17315 |