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Results for “gravitational wave”
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Catastrogenesis with unstable ALPs as the origin of the NANOGrav 15 yr gravitational wave signal
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Induced gravitational waves from flipped SU(5) superstring theory at nHz
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Gravitational wave double copy of radiation from gluon shockwave collisions
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Phase transitions in an expanding universe: stochastic gravitational waves in standard and non-standard histories
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Improved reconstruction of a stochastic gravitational wave background with LISA
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SPT-3G D1: Constraints on inflationary gravitational waves with two years of SPT-3G data
Here, we present a measurement of the 𝐵-mode polarization power spectrum of the cosmic microwave background anisotropies at 32 ≤ ℓ < 502 for three bands centered at 95, 150, and 220 GHz using data from the SPT-3G receiver on the South Pole Telescope. This work uses SPT-3G observations from the 2019 and 2020 winter observing seasons of a ∼1500 deg 2 patch of sky that directly overlaps with fields observed with the BICEP/Keck family of telescopes and covers part of the proposed Simons Observatory and CMB-S4 deep fields. Employing new techniques for mitigating polarized atmospheric noise, the SPT-3G data demonstrates a white noise level of 9.3 (6.7) μK−arcmin at ℓ ∼500 for the 95 GHz (150 GHz) data, with a 1/ℓ noise knee at ℓ = 128 (182). We fit the observed six auto- and cross-frequency 𝐵-mode power spectra to a model including lensed ΛCDM 𝐵-modes and a combination of Galactic and extragalactic foregrounds. This work characterizes foregrounds in the vicinity of the BICEP/Keck survey area, finding foreground power consistent with that reported by the BICEP/Keck collaboration within the same region and a factor of ∼3 higher power over the full SPT-3G survey area. Using SPT-3G data over the BICEP/Keck survey area, we place a 95% upper limit on the tensor-to-scalar ratio of 𝑟 <0.25 and find the statistical uncertainty on 𝑟 to be 𝜎(𝑟) = 0.067.
Gravitational wave and collider searches for electroweak symmetry breaking patterns
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Connecting the electroweak sphaleron with gravitational waves
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Gravitational waves from neutrino mass and dark matter genesis
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Stealth dark matter confinement transition and gravitational waves
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Electroweak phase transition in the 2HDM: Collider and gravitational wave complementarity
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