Two-loop Quarkonium Hamiltonian in Non-annihilation Channel
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866912119182589952 |
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| author | Mishima, Go Sumino, Yukinari Takaura, Hiromasa |
| author_facet | Mishima, Go Sumino, Yukinari Takaura, Hiromasa |
| contents | We calculate the two-loop heavy quarkonium Hamiltonian within potential-NRQCD effective field theory in the non-annihilation channel. This calculation represents the first non-trivial step towards determining the N$^4$LO Hamiltonian in the weak coupling regime. The large amount of computation is systematically handled by employing the $β$ expansion, differential equations for master integrals, and adopting a single-step matching procedure, in contrast to the conventional two-step approach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_00723 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-loop Quarkonium Hamiltonian in Non-annihilation Channel Mishima, Go Sumino, Yukinari Takaura, Hiromasa High Energy Physics - Phenomenology We calculate the two-loop heavy quarkonium Hamiltonian within potential-NRQCD effective field theory in the non-annihilation channel. This calculation represents the first non-trivial step towards determining the N$^4$LO Hamiltonian in the weak coupling regime. The large amount of computation is systematically handled by employing the $β$ expansion, differential equations for master integrals, and adopting a single-step matching procedure, in contrast to the conventional two-step approach. |
| title | Two-loop Quarkonium Hamiltonian in Non-annihilation Channel |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.00723 |