Ghost- and tachyon-free gauge-invariant, Poincaré, affine and projective Lagrangians

Details Ghost- and tachyon-free gauge-invariant, Poincaré, affine and projective Lagrangians Ghost- and tachyon-free gauge-invariant, Poincaré, affine and projective Lagrangians

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gregr..24..867b&link_type=abstract

General Relativity and Gravitation, Volume 24, Issue 8, pp.867-880

Physics

Scientific paper

We prove the existence of new classes of ghost- and tachyon- free
gauge-invariant gravity Lagrangians for the spontaneously broken
Poincaré, affine, and projective groups, respectively. To do so
the formalism of spin-projection semioperators which generalizes the one
of the ordinary spin-projection operators has been developed.

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