Physics Group Meeting

I will review some properties of BPS particles in four-dimensional N=2 field theories. I will emphasize recent developments and unsolved problems including restrictions on the charges of BPS particles, ideas about their large charge degeneracies, and relationship to BPS operators.

References:

General background on BPS states (Section 2 )
Restrictions on charges of BPS particles (Sections 1,2)
Growth of BPS degeneracies (Section 1,6,7)
Background on BPS operators
Conjectured relation between BPS states and operators