Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-07-31
Phys.Rev. D62 (2000) 125019
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, RevTex, no figures, 3 tables. Published version
Scientific paper
10.1103/PhysRevD.62.125019
The purpose of the present paper is twofold. In the first part, we provide an algebraic characterization of several families of $\nu= \frac{1}{2^n}$ $n\leq 5$ BPS states in M theory, at threshold and non-threshold, by an analysis of the BPS bound derived from the ${\cal N}=1$ D=11 SuperPoincar\'e algebra. We determine their BPS masses and their supersymmetry projection conditions, explicitly. In the second part, we develop an algebraic formulation to study the way BPS states transform under $GL(32,\bR)$ transformations, the group of automorphisms of the corresponding SuperPoincar\'e algebra. We prove that all $\nu={1/2}$ non-threshold bound states are SO(32) related with $\nu={1/2}$ BPS states at threshold having the same mass. We provide further examples of this phenomena for less supersymmetric $\nu={1/4},{1/8}$ non-threshold bound states.
Molins Jordi
Simon Jonathan
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