The influence of Debye plasma on the ground state energies of exotic systems

Abstract

The effect of plasma environment on the ground state energies of exotic systems ppµ, ddµ and ttµ has been analyzed within a generalized three-body formalism using multi-term correlated basis sets. The Debye screening model of the plasma has been adopted for such a study. The binding energies of p with pµ, d with dµ and t with tµ have been estimated for a range of values of the Debye screening parameters. The systems tend towards instability for increased screening. The effect of particle correlation has been investigated in detail and is found to play important role for the stability in these systems.

Borromean states of three-particle exotic systems with screened Coulomb interactions

“…The energies of the screening-free systems (λ = 0) can be compared with very accurate results due to Frolov [15], Bailey and Frolov [16], Kilic, Karr and Hilico [17] and Kar and Ho [18]. We compared them in our previous paper [12]. Our results agree with them reasonably well.…”

“…The ground-state energies are plotted in figure 1. Both our previous [12] and present results are used. The present results extend much the range of large λ, i.e.…”

“…In our recent paper [12] on ground states of the muonic molecular ions ppμ, ddμ and ttμ with Coulomb interactions weakened by the Debye screening we noted that for strong screening the binding energy per particle becomes in threeparticle systems larger than in bound two-particle subsystems. We interpreted this as the Thomas effect.…”

On the limit of existence of Borromean binding in three-particle systems with screened Coulomb interactions

“…We performed our computations using a variational Ritz method as described in [14,19]. However, the basis set we used is enlarged in comparison to that of [14,19]. Therefore, we describe it below.…”

The 3Po states of exotic molecular ions with exponential-cosine-screened Coulomb potentials

“…In recent years, with the gradual development of plasma technology, the study on the structural properties of atomic and molecular systems under the influence of external environments is one of the hot research areas [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Several studies on the atomic systems under Debye screening and modified Debye screening are reported [15][16][17][18][19][20][21][22].…”