Probing decoupling in dark sectors with the cosmic microwave background [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 The acoustic peaks in the angular power spectrum of cosmic microwave background (CMB) temperature and polarization anisotropies play an important role as a probe of the nature of new relativistic particles contributing to the radiation density in the ...
Gongjun Choi +2 more
semanticscholar +1 more source
Cosmic Microwave Background from Effective Field Theory
Universe, 2019 In this work, we study the key role of generic Effective Field Theory (EFT) framework to quantify the correlation functions in a quasi de Sitter background for an arbitrary initial choice of the quantum vacuum state. We perform the computation in unitary
Sayantan Choudhury
doaj +1 more source
General constraints on dark matter decay from the cosmic microwave background [PDF]
, 2016 Precise measurements of the temperature and polarization anisotropies of the cosmic microwave background can be used to constrain the annihilation and decay of dark matter. In this work, we demonstrate via principal component analysis that the imprint of
T. Slatyer, Chih-Liang Wu
semanticscholar +1 more source
Microwave background temperature at a redshift of 6.34 from H2O absorption [PDF]
Nature, 2022 Distortions of the observed cosmic microwave background provide a direct measurement of the microwave background temperature at redshifts from 0 to 1 (refs. 1,2).
D. Riechers +6 more
semanticscholar +1 more source
Polarization in the cosmic microwave background [PDF]
Brazilian Journal of Physics, 2006 Cosmic microwave background (CMB) studies underpin our understanding of the universe and its history. Until recently, we have relied principally on CMB temperature observations to build our standard cosmological model, but today the field forges ahead into its next frontier - CMB polarization anistropy.
openaire +5 more sources
Using the Full Power of the Cosmic Microwave Background to Probe Axion Dark Matter [PDF]
, 2017 The cosmic microwave background (CMB) places strong constraints on models of dark matter (DM) that deviate from standard cold DM (CDM), and on initial conditions beyond the scalar adiabatic mode.
R. Hložek, D. Marsh, D. Grin
semanticscholar +1 more source
Mosaicking with cosmic microwave background interferometers [PDF]
, 2006 Measurements of cosmic microwave background (CMB) anisotropies by interferometers offer several advantages over single-dish observations. The formalism for analyzing interferometer CMB data is well developed in the flat-sky approximation, valid for small
Cornwell T. J. +8 more
core +3 more sources
Unexpected topology of the temperature fluctuations in the cosmic microwave background [PDF]
Astronomy & Astrophysics, 2018 We study the topology generated by the temperature fluctuations of the cosmic microwave background (CMB) radiation, as quantified by the number of components and holes, formally given by the Betti numbers, in the growing excursion sets.
Pratyush Pranav +7 more
semanticscholar +1 more source
A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data [PDF]
, 2017 We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013–2014) to re-analyzed data from ...
T. C. C. P. Ade +80 more
semanticscholar +1 more source
Observing Dirac neutrinos in the cosmic microwave background [PDF]
Physical Review D, 2019 Planned CMB Stage IV experiments have the potential to measure the effective number of relativistic degrees of freedom in the early Universe, $N_\text{eff}$, with percent-level accuracy.
K. Abazajian, J. Heeck
semanticscholar +1 more source