The authors derive the next-to-leading-order two-pion-exchange potentials for heavy meson and heavy antimeson scattering and show the results are close to simple momentum-dependent contact terms.
Comment on "Possibility of Deeply Bound Hadronic Molecules from Single Pion Exchange"
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abstract
We demonstrate that in calculation, where unitarity constraints are properly imposed, the deeply bound hadronic molecules recently proposed by Close and Downum do not exist.
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Two-pion exchange for coupled-channel scattering of two heavy mesons
The authors derive the next-to-leading-order two-pion-exchange potentials for heavy meson and heavy antimeson scattering and show the results are close to simple momentum-dependent contact terms.