Open AccessLow-energy scattering properties of ground-state and excited-state positronium collisions
Author(s) -
Michael D. Higgins,
K. M. Daily,
Chris H. Greene
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1412/12/122023
Subject(s) - positronium , physics , atomic physics , singlet state , scattering , adiabatic process , excited state , ground state , elastic scattering , triplet state , inelastic scattering , parity (physics) , spin (aerodynamics) , angular momentum , electron , positron , quantum mechanics , thermodynamics
Synopsis Low-energy elastic and inelastic scattering in the Ps(1s)-Ps(2s) channel is treated in a four-body hyperspherical coordinate calculation. Adiabatic potentials are calculated for triplet-triplet, singlet-singlet, and singlet-triplet spin symmetries of coupled electrons and coupled positrons, with total angular momentum L = 0 and positive parity. Preliminary estimates of the s-wave scattering length in the elastic Ps(1s)-Ps(2s) channel were obtained. Spin recoupling is implemented to obtain calculations of experimentally relevant scattering properties for different Ps spin states.