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De Sitter space, torsion andN=1 supergravity

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Il Nuovo Cimento B (1971-1996)

Summary

We study here the origin of the torsion term in Einstein-Cartan action of gravitation and show that this is associated with the internal helicity which gives rise to the internal symmetry of hadions. This internal helicity appears here as an effect of dilatation and is related with the supersymmetry algebra generated by the anti-commutator of two eight-component conformal spinors. When the internal variable responsible for this dilatation is written in twistor formalism to explicitly show the helicity, the total space appears as a superspace. The torsion term then corresponds toN=1 supergravity which plays a very predominant role in the microlocal region of space-time.

Riassunto

Si studia qui l'origine del termine di torsione nell'azione di Einstein-Cartan di gravitazione e si mostra che esso è associato con l'elicità interna che dà origine alla simmetria interna degli adroni. Questa elicità interna appare qui come un effetto della dilatazione ed è in relazione con l'algebra della supersimmetria generata dall'anticommutatore di due spinori conformi a otto componenti. Quando la variabile interna responsabile di questa dilatazione è scritta nel formalismo del twistor per mostrare esplicitamente l'elicità, lo spazio totale appare come un superspazio. Il termine di torsione allora corrisponde alla supergravitàN=1 che svolge un ruolo veramente predominante nella regione microlocale dello spazio-tempo.

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Bandyopadhyay, A.K., Chatterjee, P. & Bandyopadhyay, P. De Sitter space, torsion andN=1 supergravity. Nuov Cim B 94, 105–118 (1986). https://doi.org/10.1007/BF02759751

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