Cosmological Particle Production and Pairwise Hotspots on the CMB
arXiv:2107.09061 · doi:10.1007/JHEP11(2021)158
Abstract
Heavy particles with masses much bigger than the inflationary Hubble scale , can get non-adiabatically pair produced during inflation through their couplings to the inflaton. If such couplings give rise to time-dependent masses for the heavy particles, then following their production, the heavy particles modify the curvature perturbation around their locations in a time-dependent and scale non-invariant manner. This results into a non-trivial spatial profile of the curvature perturbation that is preserved on superhorizon scales and eventually generates localized hot or cold spots on the CMB. We explore this phenomenon by studying the inflationary production of heavy scalars and derive the final temperature profile of the spots on the CMB by taking into account the subhorizon evolution, focusing in particular on the parameter space where pairwise hot spots (PHS) arise. When the heavy scalar has an coupling to the inflaton, we show that for an idealized situation where the dominant background to the PHS signal comes from the standard CMB fluctuations themselves, a simple position space search based on applying a temperature cut, can be sensitive to heavy particle masses . The corresponding PHS signal also modifies the CMB power spectra and bispectra, although the corrections are below (outside) the sensitivity of current measurements (searches).
arXiv comment25+5 pages, 9+2 figures
References in corpus (44)
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- Non-Gaussian features of primordial fluctuations in single field inflationary models
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- The Dynamics of General Relativity
- Towards the Theory of Reheating After Inflation
- Quantum Contributions to Cosmological Correlations
- Monodromy in the CMB: Gravity Waves and String Inflation
- A new approach to the evolution of cosmological perturbations on large scales
- Cosmological perturbations
- Quasi-Single Field Inflation and Non-Gaussianities
- Superheavy dark matter
- Adiabatic Modes in Cosmology
- TASI Lectures on Inflation
- Beauty is Attractive: Moduli Trapping at Enhanced Symmetry Points
- Probing Planckian physics: resonant production of particles during inflation and features in the primordial power spectrum
- Features and New Physical Scales in Primordial Observables: Theory and Observation
- DeepSphere: Efficient spherical Convolutional Neural Network with HEALPix sampling for cosmological applications
- Productive Interactions: heavy particles and non-Gaussianity
- A model with cosmological Bell inequalities
- Cosmological Fluctuations from Infra-Red Cascading During Inflation
- The Mexican Hat Wavelet Family. Application to point source detection in CMB maps
- Classical inflaton field induced creation of superheavy dark matter
- Effects of particle production during inflation
- Neutrino Signatures in Primordial Non-Gaussianities
- Searches for other vacua II: A new Higgstory at the cosmological collider
- Cosmological constraints from noisy convergence maps through deep learning
- Comparison of filters for the detection of point sources in Planck simulations
- The Scalar Chemical Potential in Cosmological Collider Physics
- The Future of Primordial Features with Large-Scale Structure Surveys
- Non-blind catalogue of extragalactic point sources from the Wilkinson Microwave Anisotropy Probe (WMAP) first 3--year survey data
- Gauge Boson Signals at the Cosmological Collider
- Blind and non-blind source detection in WMAP 5-year maps
- Chemical-Potential-Assisted Particle Production in FRW Spacetimes
- Wavelets Applied to CMB Maps: a Multiresolution Analysis for Denoising
- From Wires to Cosmology
- Polarization of the WMAP Point Sources
- Matrix Filters for the Detection of Extragalactic Point Sources in Cosmic Microwave Background Images
- Disorder in the Early Universe
- Higher N-point function data analysis techniques for heavy particle production and WMAP results
- Cosmological Imprints of Pre-Inflationary Particles
- A Convolutional Neural Network For Cosmic String Detection in CMB Temperature Maps
- Measuring the Duration of Last Scattering
- Inpainting CMB maps using Partial Convolutional Neural Networks
- Detection of new point-sources in WMAP Cosmic Microwave Background (CMB) maps at high Galactic latitude. A new technique to extract point sources from CMB maps