We present phase-shift calculations for positron collisions with positive ions using a complex
scaling method (CSM) in which the phase shifts are derived only from the complex …

Positronium hydride (PsH) is a weakly bound (molecular) state of two electrons (e−), a
positron (e+), and a proton (p+). Due to the e−− e+ annihilation, it decays to a number of …

Decay rates of the positronium hydride PsH, a bound state of a proton, a positron, and two
electrons, are determined for two rare channels, PsH→ p+ e− γ and PsH→ p+ e−. Previous …

We report a four-body variational calculation of a hydrogen-like atom consisting of an
excited muonic molecule consisting of d, t, and μ, and a ground state electron. Due to the …

We present a four-body calculation of s-wave scattering between a positronium (Ps) and an
antihydrogen atom (H) in the vicinity of the first Ps excitation threshold energy. We convert …