PreprintCC BY-NC-SA 4.0arXiv
Two-Pion Exchange Paradigm in Hadron-Hadron Interactions from Lattice QCD
Abstract
We study hadron-hadron interactions in (2+1)-flavor lattice QCD near the physical pion mass (mπ≃ 146MeV) using the HAL QCD method, with particular emphasis on two-pion exchange (TPE). The nucleon--flavor-singlet hadron potentials such as ϕ-N, J/ψ-N, and ηc-N are found to be attractive at all distances. Moreover, in the long-range region where one-pion exchange is forbidden, we observe lattice signatures consistent with TPE dominance. These results demonstrate that the HAL QCD method can extract universal long-distance phenomena, such as TPE, directly from nonperturbative QCD dynamics.
Versions
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BibTeX
@misc{hatsuda2026twopion,
title = {{Two-Pion Exchange Paradigm in Hadron-Hadron Interactions from Lattice QCD}},
author = {Tetsuo Hatsuda},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.34655},
eprint = {2610.34655},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.34655},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Two-Pion Exchange Paradigm in Hadron-Hadron Interactions from Lattice QCD
AU - Tetsuo Hatsuda
PY - 2026
DA - 2026/10/26
PB - arXiv
DO - 10.48550/arxiv.2610.34655
UR - https://arxiv.org/abs/2610.34655
AB - We study hadron-hadron interactions in (2+1)-flavor lattice QCD near the physical pion mass (m_π≃ 146MeV) using the HAL QCD method, with particular emphasis on two-pion exchange (TPE). The nucleon--flavor-singlet hadron potentials such as ϕ-N, J/ψ-N, and η_c-N are found to be attractive at all distances. Moreover, in the long-range region where one-pion exchange is forbidden, we observe lattice signatures consistent with TPE dominance. These results demonstrate that the HAL QCD method can extract universal long-distance phenomena, such as TPE, directly from nonperturbative QCD dynamics.
ER -