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Imprints of Spinning Particles on Primordial Cosmological Perturbations

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arxiv 1712.06626 v2 pith:FDRAGH3L submitted 2017-12-18 hep-th astro-ph.COgr-qchep-ph

Gabriele Franciolini (1) , Alex Kehagias (2) , Antonio Riotto (1) ((1) Department of Theoretical Physics , Center for Astroparticle Physics (CAP) , Geneva , Switzerland , (2) Physics Division , National Technical University of Athens
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classification hep-thastro-ph.COgr-qchep-ph
keywords higher-spinimprintsparticlesanisotropiccasecharacterisecomparedcorrelators
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abstract

If there exist higher-spin particles during inflation which are light compared to the Hubble rate, they may leave distinct statistical anisotropic imprints on the correlators involving scalar and graviton fluctuations. We characterise such signatures using the dS/CFT$_3$ correspondence and the operator product expansion techniques. In particular, we obtain generic results for the case of partially massless higher-spin states.

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  1. A note on partially massless supergravity

    hep-th 2024-12 conditional novelty 7.0 of 10

    Interactions of partially massless spin-2 with spin-3/2 fields are obstructed at second order unless a massless graviton is added, leading to N=1 conformal supergravity.

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