Zobrazeno 1 - 10
of 7 171
pro vyhledávání: '"SPECTRAL DISTORTIONS"'
Axions and axion-like particles (ALPs) remain highly motivated extensions to the standard model due to their ability to address open questions such as the relic abundance of dark matter and the strong CP problem. Axions are also capable of undergoing
Externí odkaz:
http://arxiv.org/abs/2411.13701
The magneto-hydrodynamic decay of primordial magnetic fields can distort the black-body spectrum of the cosmic microwave background (CMB) by draining magnetic energy into thermal plasmas and photons. The current limits on CMB distortion place constra
Externí odkaz:
http://arxiv.org/abs/2411.03183
Autor:
Li, Yuan-Zhen, Yu, Jiang-Hao
The primordial neutrino asymmetry leave profound imprints on the evolution history of the universe, which can be constrained by cosmological observations, including Big Bang Nucleosynthesis (BBN), Cosmic Microwave Background (CMB), and Large-Scale St
Externí odkaz:
http://arxiv.org/abs/2409.08280
The cosmic microwave background (CMB) spectrum is an extraordinary tool for exploring physics beyond the Standard Model. The exquisite precision of the measurement makes it particularly sensitive to small effects caused by hidden sector interactions.
Externí odkaz:
http://arxiv.org/abs/2409.12940
Spectral distortions of the cosmic microwave background (CMB) provide stringent constraints on energy and entropy production in the post-BBN (Big Bang Nucleosynthesis) era. This has been used to constrain dark photon models with COBE/FIRAS and foreca
Externí odkaz:
http://arxiv.org/abs/2409.12115
We compute the spectral distortions of the Cosmic Microwave Background (CMB) created by an exotic process that extracts or injects photons of a particular frequency into the CMB. Such signatures are a natural prediction of a class of composite dark m
Externí odkaz:
http://arxiv.org/abs/2407.14480
Autor:
Cyr, Bryce
The frequency spectrum of the cosmic microwave background (CMB) is a relatively untapped source of data which can allow us to peer beyond the surface of last scattering. Small deviations away from a perfect blackbody shape will encode valuable inform
Externí odkaz:
http://arxiv.org/abs/2406.12985
Autor:
Manzan, E., Albano, L., Franceschet, C., Battistelli, E. S., de Bernardis, P., Bersanelli, M., Cacciotti, F., Capponi, A., Columbro, F., Conenna, G., Coppi, G., Coppolecchia, A., D'Alessandro, G., De Gasperis, G., De Petris, M., Gervasi, M., Isopi, G., Lamagna, L., Limonta, A., Marchitelli, E., Masi, S., Mennella, A., Montonati, F., Nati, F., Occhiuzzi, A., Paiella, A., Pettinari, G., Piacentini, F., Piccirillo, L., Pisano, G., Tucker, C., Zannoni, M.
In this work, we present the design and manufacturing of the two multi-mode antenna arrays of the COSMO experiment and the preliminary beam pattern measurements of their fundamental mode compared with simulations. COSMO is a cryogenic Martin-Puplett
Externí odkaz:
http://arxiv.org/abs/2406.09349
Publikováno v:
JCAP08(2024)016
Primordial tensor modes can induce Cosmic Microwave Background spectral distortions during horizon re-entry. We investigate a specific mechanism proposed for this purpose, characterized by the coupling of an SU(2) gauge field to an axion undergoing a
Externí odkaz:
http://arxiv.org/abs/2403.08594
Publikováno v:
JCAP 07 (2024) 090
A well-known route to form primordial black holes in the early universe relies on the existence of unusually large primordial curvature fluctuations, confined to a narrow range of wavelengths that would be too small to be constrained by Cosmic Microw
Externí odkaz:
http://arxiv.org/abs/2404.18474