2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 5, 117-121

On the Coulomb corrections to the total cross section of the interaction of the $\pi^+\pi^-$ atom with ordinary atoms at high energy

D.Yu. Ivanov1 - L. Szymanowski2,3

1 Institute of Mathematics, 630090 Novosibirsk, Russia
2 Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
3 Soltan Institute for Nuclear Studies, Hoza 69, PL-00-681 Warsaw, Poland

Received: 30 November 1998 Communicated by A. Schäfer

The size of $\pi^+\pi^-$ atom in the low lying states is considerably smaller than the radius of atomic screening. Due to that we can neglect this screening calculating the contribution of multi-photon exchanges. We obtain the analytic formula for Coulomb corrections which works with a very good accuracy for the ground state of $\pi^+\pi^-$ atom.

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