One-Electron Singular Branch Lines of the Hubbard Chain
  The momentum and energy dependence of the weight distribution in the vicinity of the one-electron spectral-function singular branch lines of the 1D Hubbard model is studied for all values of the electronic density and on-site repulsion $U$. To achieve this goal we use the recently introduced pseudofermion dynamical theory. Our predictions agree quantitatively for the whole momentum and energy bandwidth with the peak dispersions observed by angle-resolved photoelectron spectroscopy in the quasi-1D organic conductor TTF-TCNQ. 
J. M. P. Carmelo, K. Penc, L. M. Martelo, P. D. Sacramento, J. M. B.   Lopes dos Santos, R. Claessen, M. Sing, and U. Schwin...