Incorporating sidereal modulation spectral features improves excess-power constraints on ultra-light dark matter by up to 36 percent at low frequencies, and an optimized cross-correlation statistic in the Band-Sampled-Data framework boosts sensitivity by up to 42 percent at low frequencies and 35 pe
Heavy spin-2 Dark Matter
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abstract
We provide further details on a recent proposal addressing the nature of the dark sectors in cosmology and demonstrate that all current observations related to Dark Matter can be explained by the presence of a heavy spin-2 particle. Massive spin-2 fields and their gravitational interactions are uniquely described by ghost-free bimetric theory, which is a minimal and natural extension of General Relativity. In this setup, the largeness of the physical Planck mass is naturally related to extremely weak couplings of the heavy spin-2 field to baryonic matter and therefore explains the absence of signals in experiments dedicated to Dark Matter searches. It also ensures the phenomenological viability of our model as we confirm by comparing it with cosmological and local tests of gravity. At the same time, the spin-2 field possesses standard gravitational interactions and it decays universally into all Standard Model fields but not into massless gravitons. Matching the measured DM abundance together with the requirement of stability constrains the spin-2 mass to be in the 1 to 100 TeV range.
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background 2representative citing papers
In dRGT massive gravity, static spherically symmetric black holes exhibit zero, one, or two photon spheres whose topological charges and stability patterns differ from Einstein gravity and from horizonless compact objects.
Limits on axion-like particles from photon-coupling searches are recast as constraints on massive graviton-like particles across lab, astrophysical, and cosmological experiments using analogous Primakoff and Gertsenshtein conversion mechanisms.
Non-primary square roots in massive gravity preserve covariance but lack analytic perturbation theory and risk complex domains.
Exact solutions and uniform approximations for GW modes in bigravity in de Sitter yield regime-dependent luminosity distances, a new bound from GW170817, and retained coherence between massless and massive signal components.
citing papers explorer
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Optimising ultra-light dark matter searches with ground-based interferometers
Incorporating sidereal modulation spectral features improves excess-power constraints on ultra-light dark matter by up to 36 percent at low frequencies, and an optimized cross-correlation statistic in the Band-Sampled-Data framework boosts sensitivity by up to 42 percent at low frequencies and 35 pe
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Topological charge and black hole photon spheres in massive gravity
In dRGT massive gravity, static spherically symmetric black holes exhibit zero, one, or two photon spheres whose topological charges and stability patterns differ from Einstein gravity and from horizonless compact objects.
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Bounds on massive graviton-like particles from searches for axion-like particles coupling to photons
Limits on axion-like particles from photon-coupling searches are recast as constraints on massive graviton-like particles across lab, astrophysical, and cosmological experiments using analogous Primakoff and Gertsenshtein conversion mechanisms.
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Non-primary square roots in massive gravity
Non-primary square roots in massive gravity preserve covariance but lack analytic perturbation theory and risk complex domains.
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Gravitational wave propagation in bigravity in the late universe
Exact solutions and uniform approximations for GW modes in bigravity in de Sitter yield regime-dependent luminosity distances, a new bound from GW170817, and retained coherence between massless and massive signal components.