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Title: Prospects for cosmological collider physics

Abstract

It is generally expected that heavy fields are present during inflation, which can leave their imprint in late-time cosmological observables. The main signature of these fields is a small amount of distinctly shaped non-Gaussianity, which if detected, would provide a wealth of information about the particle spectrum of the inflationary Universe. Here we investigate to what extent these signatures can be detected or constrained using futuristic 21-cm surveys. We construct model-independent templates that extract the squeezed-limit behavior of the bispectrum, and examine their overlap with standard inflationary shapes and secondary non-Gaussianities. We then use these templates to forecast detection thresholds for different masses and couplings using a 3D reconstruction of modes during the dark ages ( z ∼ 30–100). We consider interactions of several broad classes of models and quantify their detectability as a function of the baseline of a dark ages interferometer. Our analysis shows that there exists the tantalizing possibility of discovering new particles with different masses and interactions with future 21-cm surveys.

Authors:
 [1];  [2];  [3];  [4]
  1. CITA, University of Toronto, 60 St. George Street, Toronto (Canada)
  2. Sorbonne Universités, UPMC Université Paris 06, UMR7095, Paris (France)
  3. Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218 (United States)
  4. Institute for Theory and Computation, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
Publication Date:
OSTI Identifier:
22679951
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; COUPLING; DETECTION; INFLATIONARY UNIVERSE; INTERACTIONS; INTERFEROMETERS; MASS; SPECTRA

Citation Formats

Meerburg, P. Daniel, Münchmeyer, Moritz, Muñoz, Julian B., and Chen, Xingang, E-mail: meerburg@cita.utoronto.ca, E-mail: mmunchmeyer@perimeterinstitute.ca, E-mail: julianmunoz@jhu.edu, E-mail: xingang.chen@cfa.harvard.edu. Prospects for cosmological collider physics. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/03/050.
Meerburg, P. Daniel, Münchmeyer, Moritz, Muñoz, Julian B., & Chen, Xingang, E-mail: meerburg@cita.utoronto.ca, E-mail: mmunchmeyer@perimeterinstitute.ca, E-mail: julianmunoz@jhu.edu, E-mail: xingang.chen@cfa.harvard.edu. Prospects for cosmological collider physics. United States. doi:10.1088/1475-7516/2017/03/050.
Meerburg, P. Daniel, Münchmeyer, Moritz, Muñoz, Julian B., and Chen, Xingang, E-mail: meerburg@cita.utoronto.ca, E-mail: mmunchmeyer@perimeterinstitute.ca, E-mail: julianmunoz@jhu.edu, E-mail: xingang.chen@cfa.harvard.edu. Wed . "Prospects for cosmological collider physics". United States. doi:10.1088/1475-7516/2017/03/050.
@article{osti_22679951,
title = {Prospects for cosmological collider physics},
author = {Meerburg, P. Daniel and Münchmeyer, Moritz and Muñoz, Julian B. and Chen, Xingang, E-mail: meerburg@cita.utoronto.ca, E-mail: mmunchmeyer@perimeterinstitute.ca, E-mail: julianmunoz@jhu.edu, E-mail: xingang.chen@cfa.harvard.edu},
abstractNote = {It is generally expected that heavy fields are present during inflation, which can leave their imprint in late-time cosmological observables. The main signature of these fields is a small amount of distinctly shaped non-Gaussianity, which if detected, would provide a wealth of information about the particle spectrum of the inflationary Universe. Here we investigate to what extent these signatures can be detected or constrained using futuristic 21-cm surveys. We construct model-independent templates that extract the squeezed-limit behavior of the bispectrum, and examine their overlap with standard inflationary shapes and secondary non-Gaussianities. We then use these templates to forecast detection thresholds for different masses and couplings using a 3D reconstruction of modes during the dark ages ( z ∼ 30–100). We consider interactions of several broad classes of models and quantify their detectability as a function of the baseline of a dark ages interferometer. Our analysis shows that there exists the tantalizing possibility of discovering new particles with different masses and interactions with future 21-cm surveys.},
doi = {10.1088/1475-7516/2017/03/050},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2017,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}