<p>In this paper, we continue our investigation of gravitational interactions for massive higher spins extending our previous work on massive spin 3/2 and spin 2 to massive spin 5/2, including partially massless and massless limits. We use the gauge invariant frame-like description for massive fields, both for general analysis of possible vertices and for constructing the minimal vertex (i.e. vertex containing standard minimal interactions and non-minimal interactions with a minimum number of derivatives). In particular, we show that there is a special point <i>m</i><sup>2</sup> = 4Λ, which corresponds to the boundary of a unitary allowed region in <i>dS</i><sub>4</sub>, where minimal interactions disappear, leaving only non-minimal ones.</p>

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On massive higher spins and gravity. Part I. Spin 5/2

  • Yu. M. Zinoviev

摘要

In this paper, we continue our investigation of gravitational interactions for massive higher spins extending our previous work on massive spin 3/2 and spin 2 to massive spin 5/2, including partially massless and massless limits. We use the gauge invariant frame-like description for massive fields, both for general analysis of possible vertices and for constructing the minimal vertex (i.e. vertex containing standard minimal interactions and non-minimal interactions with a minimum number of derivatives). In particular, we show that there is a special point m2 = 4Λ, which corresponds to the boundary of a unitary allowed region in dS4, where minimal interactions disappear, leaving only non-minimal ones.