University of Minnesota
School of Physics & Astronomy
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Arkady Vainshtein

“Dyon dynamics near marginal stability and non-BPS states“
A. Ritz and A. Vainshtein, Phys. Lett. B 668, 148 (2008)

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We derive the general form of the moduli-space effective action for the long-range interaction of two BPS dyons in N=2 gauge theories. This action determines the bound state structure of various BPS and non-BPS states near marginal stability curves, and we utilise it to compute the leading correction to the BPS-mass of zero-torsion non-BPS bound states close to marginal stability.