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  Probing higher-spin fields from inflation with higher-order statistics of the CMB

Bordin, L., & Cabass, G. (2019). Probing higher-spin fields from inflation with higher-order statistics of the CMB. Journal of Cosmology and Astroparticle Physics, 2019(6): 050. doi:10.1088/1475-7516/2019/06/050.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-4F6F-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-4F70-6
Genre: Journal Article

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 Creators:
Bordin, Lorenzo, Author
Cabass, Giovanni1, Author              
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1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              

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 Abstract: We investigate the degree to which the Cosmic Microwave Background (CMB) can be used to constrain primordial non-Gaussianity coming from the presence of spinning particles coupled to the inaton. We compute the hTTTi and hTTTTi correlation functions arising from the exchange of a particle with spin s and generic mass, and the corresponding signal-to-noise ratios for a cosmic-variance-limited CMB experiment. We show that already with Planck data one could improve the theoretical bounds on the amplitude of these primordial templates by an order of magnitude. We particularly emphasize the fact that the trispectrum could be sizable even if the bispectrum is not, making it a prime observable to explore the particle content during ination.

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Language(s): eng - English
 Dates: 2019-06-25
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1475-7516/2019/06/050
Other: LOCALID: 3148243
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Title: Journal of Cosmology and Astroparticle Physics
  Abbreviation : J. Cosmol. Astropart. Phys.
  Abbreviation : JCAP
Source Genre: Journal
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Pages: - Volume / Issue: 2019 (6) Sequence Number: 050 Start / End Page: - Identifier: ISSN: 1475-7516