Stability diagrams of plasma-embedded three-unit-charge systems: Borromean states and the Efimov effect

FEDERICO M. PONT; PABLO SERRA

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

Año: 2009 vol. 79 p. 32508 - 32516

1050-2947

The stability of the ground state of three-unit charge qi=±1,±11, interacting through a statically screened Coulomb potential, has been studied as a function of the values of the constituent masses for different values of the screening parameter. General conditions are given and accurate variational calculations have been performed to determine the region where the three-body ground state is Borromean. The possible existence of Efimov states when the screening parameter is equal to the two-body critical screening parameter is discussed. The critical exponent for the energy in different regions of the stability diagram has been also calculated.