Work

Two-Loop Quarkonium Hamiltonian in Nonannihilation Channel

Year: 2024

Type: article

Abstract: 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.231903

Authors: Go Mishima, Yukinari Sumino, Hiromasa Takaura

Institutions: Tohoku University, Kyoto University, Yukawa Institute for Theoretical Physics

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: Yukawa Memorial Foundation, Japan Society for the Promotion of Science