The confined variational method is used to study S-, P-, and D-wave positronium-hydrogen scattering with the scattering energy between 0.068 and 3.333 eV. Accurate phase shifts and S-wave scattering lengths are calculated and compared with other theoretical methods. Existing discrepancies for the D-wave phase shifts are resolved. According to collision momentum, total orbital angular momentum, and spin configuration, the distortion effects of positronium are quantitatively studied. Finally, the finite nuclear mass effects are investigated.
Bibliographical noteKAUST Repository Item: Exported on 2021-02-19
Acknowledgements: This work was supported by the National Natural Science Foundation of China under Grants No. 11704399 and No. 11934014, by the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant No. XDB21030300, and by the National Key Research
and Development Program of China under Grant No. 2017YFA0304402. The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). Z.-C. Y. was supported by NSERC of Canada.