Exotic affinities under Debye plasma

Muonic affinities of the exotic system π+μ− have been calculated variationally using a general three-body formalism. The system is found to be stable in the ground state under Coulomb coupling. The stability of this system under an external plasma environment has been analyzed using multiterm correlated basis sets of Hylleraas type. The effect of external plasma has been incorporated using the standard Debye screening model. The system tends toward gradual instability under the increased strength of the plasma, and the affinities have been found to decrease gradually and systematically. The effect of correlation on the exotic affinities has been analyzed in detail. The effect of angular correlation on exotic affinities is found to be around 40–80%.