On the Coulomb corrections to the total cross section of the interaction of the π+π- atom with ordinary atoms at high energy
D. Yu. Ivanov, L. Szymanowski
Abstract
The size of π+π- 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 π+π- atom.
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