Born approximation Coulomb-dipole theory Electron-Positron Scatterings Feshbach and shape resonance states Feshbach states Gailitis resonance LENR Research & information: general Stark effects analytical antihydrogen antihydrogen ion atoms and molecules autoionization states complex-coordinate rotation method coronal mass ejections correlated exponential wave functions cross sections and spin polarization doubly excited states electron-impact ionization free–free transitions hydrogen hydrogen ion muon catalyzed fusion opacity photoabsorption photodetachment photoionization pion decay positron annihilation