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

• Published in: Physics letters. B Vol. 712; no. 4-5; pp. 437 - 441
• Main Authors: Ishii, Noriyoshi, Aoki, Sinya, Doi, Takumi, Hatsuda, Tetsuo, Ikeda, Yoichi, Inoue, Takashi, Murano, Keiko, Nemura, Hidekatsu, Sasaki, Kenji
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 12.06.2012; Elsevier
• Subjects: Exact sciences and technology; Hadron interaction; Lattice QCD; Nuclear force; Nuclear physics; Physics; Scattering phase shift; The physics of elementary particles and fields; Lattice QCD; Scattering phase shift; Hadron interaction; Nuclear force; Hadrons; Hadron-hadron interactions; Nucleon-nucleon potential; Saturation state; Lattice theory; Ground states; Wave functions; Baryons; Nucleon-nucleon interactions
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2012.04.076

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.