Elsevier

Physics Letters B

Volume 712, Issues 4–5, 12 June 2012, Pages 437-441
Physics Letters B

Hadron–hadron interactions from imaginary-time Nambu–Bethe–Salpeter wave function on the lattice

https://doi.org/10.1016/j.physletb.2012.04.076Get rights and content
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Abstract

Imaginary-time Nambu–Bethe–Salpeter (NBS) wave function is introduced to extend our previous approach for hadron–hadron interactions on the lattice. Scattering states of hadrons with different energies encoded in the NBS wave function are utilized to extract non-local hadron–hadron potential. “The ground state saturation”, which is commonly used in lattice QCD but is hard to be achieved for multi-baryons, is not required. We demonstrate that the present method works efficiently for the nucleon–nucleon interaction (the potential and the phase shift) in the S01 channel.

Keywords

Nuclear force
Lattice QCD
Hadron interaction
Scattering phase shift

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