The OSp(1|4) Superparticle and Exotic BPS States
Igor Bandos, Jerzy Lukierski, Dmitri Sorokin
TL;DR
This paper explores the dynamics of a superparticle in a superspace with OSp(1|4) symmetry, revealing how tensorial central charges encode spin and lead to exotic BPS states preserving 3/4 supersymmetry.
Contribution
It introduces a superparticle model with tensorial central charges that describe spin and exhibits novel BPS states with unusual supersymmetry preservation.
Findings
Quantum states form an infinite tower of helicities.
The model admits BPS states preserving 3/4 of supersymmetry.
Tensorial central charges encode spin degrees of freedom.
Abstract
We discuss the dynamics of a superparticle in a superspace whose isometry is generated by the superalgebra OSp(1|4) or its central-charge contraction. Extra coordinates of the superspace associated with tensorial central charges are shown to describe spin degrees of freedom of the superparticle, so quantum states form an infinite tower of (half)-integer helicities. A peculiar feature of the model is that it admits BPS states which preserve 3/4 of target-space supersymmetries.
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