Pionium in the elementary particle decays

Abstract

Some atomic decays of elementary particles with pionium (${\pi }^{+}{\pi }^{-}$-dimesoatom) in the final state are considered. Only for K-meson atomic decays are the corresponding branching ratios big enough to make their experimental study realistic. The $O(\alpha )$ order corrections to the lifetime of pionium are also calculated.

12 pages, to appear in Pis'ma Zh. Eks. Teor. Fiz. 60(1994),673

Cited by in corpus (7)

• Observation of a cusp-like structure in the pizero-pizero invariant mass distribution from K+- ==> pi+- pizero pizero decay and determination of the pi-pi scattering lengths
• Determination of the S-wave pi pi scattering lengths from a study of K+- -> pi+- pi0 pi0 decays
• Radiative corrections in K --> 3 pi decays
• Decay widths and energy shifts of pi pi and pi K atoms
• Lifetime of $({\pi }^{+}{\pi }^{-})$ Atom: Analysis of the Role of Strong Interactions
• Energy and decay width of the pi-K atom
• Formation of $\pi \mu$ atoms in $K_{μ4} decay