Two-Loop Quarkonium Hamiltonian in Nonannihilation Channel
We calculate the two-loop heavy quarkonium Hamiltonian within potential-nonrelativistic-QCD effective field theory in the nonannihilation channel. This calculation represents the first nontrivial step toward 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.
Authors
- Y. Sumino (ORCID: https://orcid.org/0000-0003-1921-8889)
- Hiromasa Takaura (ORCID: https://orcid.org/0000-0002-6761-6868)
- Go Mishima (ORCID: https://orcid.org/0000-0002-1676-8431)
Institutions
- Tohoku University (JP)
- Kyoto University (JP)
- Instituto de Física Teórica (ES)
- Yukawa Institute for Theoretical Physics (JP)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-12-06
- DOI
- https://doi.org/10.1103/physrevlett.133.231903
- Citations
- 2
- Primary Topic
- Quantum, superfluid, helium dynamics
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- Yukawa Memorial Foundation
- Japan Society for the Promotion of Science