The cosmological Slavnov-Taylor identity from BRST symmetry in single-field inflation
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas - ECT*, Villa Tambosi, Strada delle Tabarelle 286, I-38123 Villazzano (Italy)
The cosmological Slavnov-Taylor (ST) identity of the Einstein-Hilbert action coupled to a single inflaton field is obtained from the Becchi-Rouet-Stora-Tyutin (BRST) symmetry associated with diffeomorphism invariance in the Arnowitt-Deser-Misner (ADM) formalism. The consistency conditions between the correlators of the scalar and tensor modes in the squeezed limit are then derived from the ST identity, together with the softly broken conformal symmetry. Maldacena's original relations connecting the 2- and 3-point correlators at horizon crossing are recovered, as well as the next-to-leading corrections, controlled by the special conformal transformations.
- OSTI ID:
- 22524923
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 03 Vol. 2016; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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