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                                 Abstract:We solve, in this paper, the Bethe-Salpeter equation with spin (0-1/2) and unequalmass for Coulombic atom. The approximate solution thus obtained as well as theperturbation expansion of composite particle field theory are then applied for cal-culating the probability of production of (π士μ干) atom in KLo-decay. The comparisonwith a preliminary experimental result is also presented.
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                        References
	
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