Sandner, Stefan - Search Results - CERN Document Server

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Perturbatively including inhomogeneities in axion inflation / Domcke, Valerie (CERN) ; Ema, Yohei (Minnesota U.) ; Sandner, Stefan (Valencia U., IFIC)
Axion inflation, i.e. an axion-like inflaton coupled to an Abelian gauge field through a Chern-Simons interaction, comes with a rich and testable phenomenology. [...]
arXiv:2310.09186; IFIC/23-45; FTUV-23-1005.0503; UMN-TH-4226/23; FTPI-MINN-23-18; CERN-TH-2023-186.- 2024-03-12 - 22 p. - Published in : JCAP 2403 (2024) 019 Fulltext: document - PDF; 2310.09186 - PDF;

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Precision CMB constraints on eV-scale bosons coupled to neutrinos / Sandner, Stefan (Valencia U., IFIC) ; Escudero, Miguel (CERN) ; Witte, Samuel J. (Amsterdam U. ; U. Amsterdam, GRAPPA ; ICC, Barcelona U.)
The cosmic microwave background (CMB) has proven to be an invaluable tool for studying the properties and interactions of neutrinos, providing insight not only into the sum of neutrino masses but also the free streaming nature of neutrinos prior to recombination. The CMB is a particularly powerful probe of new eV-scale bosons interacting with neutrinos, as these particles can thermalize with neutrinos via the inverse decay process, $\nu\bar{\nu} \rightarrow X$, and suppress neutrino free streaming near recombination -- even for couplings as small as $\lambda_\nu \sim \mathcal{O}(10^{-13})$. [...]
arXiv:2305.01692; IFIC/23-13; FTUV-23-0413.0599; CERN-TH-2023-073.- 2023-08-09 - 19 p. - Published in : Eur. Phys. J. C 83 (2023) 709 Fulltext: 2305.01692 - PDF; document - PDF;

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1	Sandner, S.

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