scholarly journals How does the cosmic microwave background plus big bang nucleosynthesis constrain new physics?

2001 ◽  
Vol 64 (12) ◽  
Author(s):  
James P. Kneller ◽  
Robert J. Scherrer ◽  
Gary Steigman ◽  
Terry P. Walker
Keyword(s):  
Cosmic Microwave Background ◽  
Big Bang ◽  
New Physics ◽  
Microwave Background ◽  
Big Bang Nucleosynthesis

scholarly journals Status of CMB Observations in 2015

2016 ◽  
Vol 43 ◽  
pp. 1660188
Author(s):  
Martin Bucher
Keyword(s):  
Cosmic Microwave Background ◽  
Frequency Spectrum ◽  
Gravitational Lensing ◽  
Big Bang ◽  
New Physics ◽  
Microwave Background ◽  
Precise Characterization ◽  
Modern Cosmology ◽  
History Of

The 2.725 K cosmic microwave background has played a key role in the development of modern cosmology by providing a solid observational foundation for constraining possible theories of what happened at very large redshifts and theoretical speculation reaching back almost to the would-be big bang initial singularity. After recounting some of the lesser known history of this area, I summarize the current observational situation and also discuss some exciting challenges that lie ahead: the search for B modes, the precision mapping of the CMB gravitational lensing potential, and the ultra-precise characterization of the CMB frequency spectrum, which would allow the exploitation of spectral distortions to probe new physics.

THE EFFECT OF RELIC PARTICLE ANNIHILATIONS ON THE COSMIC MICROWAVE BACKGROUND

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 1046-1049
Author(s):  
ROBERT J. SCHERRER
Keyword(s):  
Cosmic Microwave Background ◽  
Big Bang ◽  
Interacting Particles ◽  
Microwave Background ◽  
Big Bang Nucleosynthesis ◽  
Planck Spectrum ◽  
Particle Annihilations

A relic particle X which annihilates with its antiparticle [Formula: see text] into electromagnetically-interacting particles, e.g. [Formula: see text], γγ, etc., will lead to a distortion in the spectrum of the cosmic microwave background (CMB). The magnitude of this effect is calculated and compared with known limits on the deviations of the CMB from a Planck spectrum. Limits which can be placed on such a particle are found to be competitive with similar limits from Big Bang nucleosynthesis.

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