149 citations · 1k across the 32 of their papers we have counts for
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Detecting Axion-Like Particles With Coiled Optical Fibers I: Silica Fibers
Gia Dvali, Sebastian Zell, Tongxuan Zhang
We propose a new approach to axion-like particle (ALP) searches based on long, coiled optical fibers in an external magnetic field. We develop the theoretical framework required to…
No Dark Matter Axion During Minimal Higgs Inflation
Claire Rigouzzo, Sebastian Zell
We study minimal versions of Higgs inflation in the presence of a massless QCD axion. While the inflationary energy scale of the metric variant is too high to accommodate isocurvat…
Critical Points in Palatini Higgs Inflation with Small Non-Minimal Coupling
Arthur Poisson, Inar Timiryasov, Sebastian Zell
We investigate inflation driven by the Higgs boson in the Palatini formulation of General Relativity. Our analysis primarily focuses on a small non-minimal coupling of the Higgs fi…
Field redefinitions, perturbative unitarity and Higgs inflation
Georgios K. Karananas, Mikhail Shaposhnikov, Sebastian Zell
For inflation driven by the Higgs field coupled non-minimally to gravity, we study the cutoff energy scale above which perturbation theory breaks down. Employing the metric formula…
Einstein-Cartan Portal to Dark Matter
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov +1
It is well-known since the works of Utiyama and Kibble that the gravitational force can be obtained by gauging the Poincaré group, which puts gravity on the same footing as the Sta…
Higgs inflation in Einstein-Cartan gravity
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov +1
We study inflation driven by the Higgs field in the Einstein-Cartan formulation of gravity. In this theory, the presence of the Holst and Nieh-Yan terms with the Higgs field non-mi…
Quantum Effects in Palatini Higgs Inflation
Mikhail Shaposhnikov, Andrey Shkerin, Sebastian Zell
We study quantum effects in Higgs inflation in the Palatini formulation of gravity, in which the metric and connection are treated as independent variables. We exploit the fact tha…
Classicality and Quantum Break-Time for Cosmic Axions
Gia Dvali, Sebastian Zell
We investigate the length of the period of validity of a classical description for the cosmic axion field. To this end, we first show that we can understand the oscillating axion s…