Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-10-05
Phys.Lett. B452 (1999) 155-158
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures
Scientific paper
10.1016/S0370-2693(99)00256-7
The influence of strong $\pi^+\pi^-$ interaction of the behaviour of pionium nS-state wave functions at small distance are investigated both analytically (perturbatively) and so numerically. It is shown that in the whole the accounting of strong interaction results in multiplying of pure Coulomb pionium wave functions by some function practically independent on value of principal quantum number n. Due to this reason the n-independence of probability of $\pi^+\pi^-$ atom production in nS-state remains the same as in case of pure Coulomb $\pi^+\pi^-$ interaction
Amirkhanov I.
Puzynin I.
Tarasov Alexander
Voskresenskaya O. O.
Zeinalova O.
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