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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.08846 |
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| _version_ | 1866914380660080640 |
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| author | Escario, Jose M. Maier, Andreas Peset, Clara Pineda, Antonio |
| author_facet | Escario, Jose M. Maier, Andreas Peset, Clara Pineda, Antonio |
| contents | We compute the hyperfine splitting of P-wave heavy quarkonium states with next-to-next-to-next-to-next-to-leading-order accuracy. The resummation of logarithms with next-to-next-to-next-to-next-to-leading-logarithmic accuracy is also addressed. A phenomenological analysis of these results is performed for bottomonium, charmonium and the $B_c$ system. We also apply these results to positronium, muonium, hydrogen and muonic hydrogen. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_08846 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The ultrafine splitting of heavy quarkonium with next-to-next-to-next-to-next-to-leading-order accuracy Escario, Jose M. Maier, Andreas Peset, Clara Pineda, Antonio High Energy Physics - Phenomenology Atomic Physics We compute the hyperfine splitting of P-wave heavy quarkonium states with next-to-next-to-next-to-next-to-leading-order accuracy. The resummation of logarithms with next-to-next-to-next-to-next-to-leading-logarithmic accuracy is also addressed. A phenomenological analysis of these results is performed for bottomonium, charmonium and the $B_c$ system. We also apply these results to positronium, muonium, hydrogen and muonic hydrogen. |
| title | The ultrafine splitting of heavy quarkonium with next-to-next-to-next-to-next-to-leading-order accuracy |
| topic | High Energy Physics - Phenomenology Atomic Physics |
| url | https://arxiv.org/abs/2603.08846 |