Quasi-single field inflation with large mass
By Xingang Chen, Yi Wang. 2012
192 citations recorded by the source corpus.
We study the effect of massive isocurvaton on density perturbations in quasi-single field inflation models, when the mass of the isocurvaton M becomes larger than the order of the Hubble parameter H. We analytically compute the correction to the power spectrum, leading order in coupling but exact for all values of mass. This verifies the previous numerical results for the range 0 < M < 3H/2 and shows that, in the large mass limit, the correction is of order H2/M2.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/2e80a0f02d3360966cf2f373f5e21db3f6e70e05
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Citations in the corpus
- Bootstrapping inflationary correlators in Mellin space (2019, background): “Non-Gaussianities in primordial correlation functions encode the physics of inflation, including interactions and field content, and the ultimate goal of the “Cosmological Collider Physics” programme [22–39] is to classify the possible shapes of non-Gaussianities for comparison with observations.”
- Non-Gaussianity as a particle detector (2016, background): “• For cπ = 1, the above decomposition of the σ-propagator into local and non-local pieces leads to [38]”
- The cosmological bootstrap: inflationary correlators from symmetries and singularities (2018, unknown): “collider physics” [49–64], giving physically motivated templates for comparison with observational data.”
- Inflation, Cosmic Perturbations and Non-Gaussianities (2013, methodology): “The analytical expression of δ is given as δ = 8θ̇(2)(C1 + C2)/H(2) in [99].”
- Effective field theory approach to quasi-single field inflation and effects of heavy fields (2012, methodology): “To perform this kind of integrals, we use a trick of resummation [31].”
- The Cosmological Bootstrap: Spinning correlators from symmetries and factorization (2020, background): “Such a classification would provide the conceptual foundation for the discipline of “cosmological collider physics” [13–39], and facilitate a deeper understanding of theoretical constraints on cosmological correlators.”
- The cosmological bootstrap: weight-shifting operators and scalar seeds (2019, background): “) Although these solutions describe static boundary correlators, they encode time-dependent processes in the bulk, including the production and decay of very massive particles [12, 35–55].”