TL;DR
This paper constructs actions for multi-superparticle systems in higher-dimensional spacetimes, revealing their symmetries and interactions with super Yang-Mills backgrounds, extending superparticle theory beyond traditional dimensions.
Contribution
It introduces new actions for two- and three-superparticle systems in (10,2) and (11,3) dimensions with generalized symmetries and background interactions.
Findings
Actions exhibit worldline bosonic and fermionic symmetries.
Superparticles propagate in backgrounds of other superparticles.
Symmetries persist with super Yang-Mills backgrounds.
Abstract
Actions for two-superparticle system in (10,2) dimensions and three-superparticle systems in (11,3) dimensions are constructed. These actions have worldline bosonic and fermionic local symmetries, and target space global supersymmety generalizing the reparametrization, kappa-symmetry and Poincare supersymmetry of the usual superparticle. With the second particle, or the second and third particles on-shell, they describe a superparticle propagating in the background of a second superparticle in (10,2) dimensions, or two other superparticles in (11,3) dimensions. Symmetries of the action are shown to exist in presence of super Yang-Mills background as well.
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