Possible manifestation of the 2 p pionium in particle physics processes
Abstract
We suggest a few particle physics processes in which excited 2 p pionium A2π ' may be observed. They include the e+e-→π+π- annihilation, the V0→π0ℓ+ℓ-andK±→π±ℓ+ℓ- (ℓ=e , μ ) decays, and the photoproduction of two neutral pions from nucleons. We analyze available experimental data and find that they, in some cases, indicate the presence of 2 p pionium, but do not provide definite proof.
- Publication:
-
Physical Review D
- Pub Date:
- October 2020
- DOI:
- 10.1103/PhysRevD.102.073004
- arXiv:
- arXiv:2009.05616
- Bibcode:
- 2020PhRvD.102g3004L
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 11 pages, 11 figures, 5 tables