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- Title
On the Bosonic Atoms.
- Authors
Amusia, M. Ya.; Chernysheva, L. V.
- Abstract
We investigate the ground state properties of atoms, in which substitute fermions—electrons by bosons, namely, π−-mesons. We perform some calculations in the frame of modified Hartree-Fock (HF) equation. The modification takes into account symmetry, instead of antisymmetry of the pair identical bosons wavefunction. The modified HF approach thus enhances (doubles) the effect of self-action for the boson case. Therefore, we accordingly modify the HF equations by eliminating the self-action terms “by hand.” The contribution of meson-meson and meson-nucleon non-Coulomb interaction is inessential at least for atoms with low and intermediate nuclear charge, which is our main subject. We found that the binding energy of pion negative ions <italic>A</italic>π-, pion atoms <italic>A</italic>π, and the number of extra bound pions Δ<italic>N</italic>π increases with the nuclear charge <italic>Z</italic>. In particular, for Xe Δ<italic>N</italic>π = 4. As an example of a simple process with a pion atom, we consider photoionization that differs essentially from that for electron atoms. Namely, it is not monotonic decreasing from the threshold but has instead a prominent maximum above threshold. We study also elastic scattering of pions by pion atoms.
- Subjects
BOSONS; GROUND state energy; HARTREE-Fock approximation; WAVE functions; ELASTIC scattering; NUCLEAR charge; FERMIONS
- Publication
JETP Letters, 2018, Vol 107, Issue 2, p91
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364018020017