TY  - JOUR
AU  - Tani, A.
AU  - Ikeno, N.
AU  - Jido, D.
AU  - Nagahiro, H.
AU  - Fujioka, H.
AU  - Itahashi, K.
AU  - Hirenzaki, S.
PY  - 2021
DA  - 2021//
TI  - Structure of double pionic atoms
T2  - Prog. Theor. Exp. Phys.
JO  - Progress of Theoretical and Experimental Physics
SP  - 033D02
EP  - 16pp
VL  - 2021
IS  - 3
PB  - Oxford Univ Press Inc
AB  - We study theoretically the structure of double pionic atoms, in which two negatively charged pions (pi(-)) are bound in the atomic orbits. The double pionic atom is considered to be an interesting system from the point of view of the multi-bosonic systems. In addition, it could be possible to deduce valuable information on the isospin I = 2 pi pi interaction and the pionnucleus strong interaction. In this paper, we take into account the pi pi strong and electromagnetic interactions, and evaluate the effects on the binding energies by perturbation theory for the double pionic atoms in heavy nuclei. We investigate several combinations of two pionic states and find that the order of magnitude of the energy shifts due to the pi pi interaction is around 10 keV for the strong interaction and around 100 keV for the electromagnetic interaction for the ground states.
SN  - 2050-3911
UR  - https://arxiv.org/abs/2012.12236
UR  - https://doi.org/10.1093/ptep/ptab023
DO  - 10.1093/ptep/ptab023
LA  - English
N1  - WOS:000642331700010
ID  - Tani_etal2021
ER  -