Superparticle models with tensorial central charges

Abstract

A generalization of the Ferber-Shirafuji formulation of superparticle mechanics is considered. The generalized model describes the dynamics of a superparticle in a superspace extended by tensorial central charge coordinates and commuting twistor-like spinor variables. The D = 4 model contains a continuous real parameter a ≥ 0 and at a = 0 reduces to the SU (2, 2|1) supertwistor Ferber-Shirafuji model, while at a = 1 one gets an OSp(1|8) supertwistor model of ref.[1] which describes BPS states with all but one unbroken target space supersymmetries. When 0 < a < 1 the model admits an OSp(2|8) supertwistor description, and when a > 1 the supertwistor group becomes OSp(1, 1|8). We quantize the model and find that its quantum spectrum consists of massless states of an arbitrary (half)integer helicity. The independent discrete central charge coordinate describes the helicity spectrum.We also outline the generalization of the a = 1 model to higher space-time dimensions and demonstrate that in D = 3, 4, 6 and 10, where the quantum states are massless, the extra degrees of freedom (with respect to those of the standard superparticle) parametrize compact manifolds. These compact manifolds can be associated with higher-dimensional helicity states. In particular, in D = 10 the additional "helicity" manifold is isomorphic to the sphere S 7 . *

Partition functions for higher-spin theories in AdS

“…There is additionally the intriguing possibility that these might be connected to multiparticle symmetries already noted in the literature for higher-spin theories [40,41,42]. 6 Note: After an initial version of this paper appeared on the arXiv, we learned of [43,44,45], in which additional enhanced symmetries for higher-spin theories had been observed. 7 It is also possible that our results are related to these symmetries.…”

Holography as a gauge phenomenon in Higher Spin duality

“…There are a number of other relevant studies of spinning particles in AdS space, in particular [37,38]. It will be interesting to incorporate the present scheme in future work as part of the more general a tensor particle theory [39][40][41] and a so called "parent theory" [42] from which Fronsdal's and Vasiliev's unfolded formulations are known to follow through two different reductions.…”

Generalized Supersymmetries and Composite Structure in M-Theory

“…(ii) Mixed geometric picture, with the components ω (i) expressed by means of the relation (22). One obtains from (26)…”

“…We mention here two interesting aspects of the presented approach which deserve further attention; ¶ For D = 4, 6 and 10 see 22,23 . …”