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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Helioscope for gravitationally bound millicharged particles
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Electroweak phase transition in the 2HDM: Collider and gravitational wave complementarity
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Gravitational portals with nonminimal couplings
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Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
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Gravitational wave pathway to testable leptogenesis
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J / ψ near threshold in holographic QCD: A and D gravitational form factors
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Have pulsar timing arrays detected the hot big bang: Gravitational waves from strong first order phase transitions in the early Universe
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Efficient gravitational wave template bank generation with differentiable waveforms
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Probing early Universe supercooled phase transitions with gravitational wave data
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Renormalization group for nonminimal Φ 2 R couplings and gravitational contact interactions
Theories of scalars and gravity, with an Einstein-Hilbert term and nonminimal interactions, M 2 R / 2 - α Φ 2 R / 12 , have graviton exchange-induced contact interactions. These modify the renormalization group, leading to a discrepancy between the conventional calculations in the Jordan frame that ignore this effect (and are found to be incorrect), and the Einstein frame in which α does not exist. Thus, the calculation of quantum effects in the Jordan and Einstein frames does not generally commute with the transition from the Jordan to the Einstein frame. In the Einstein frame, though α is absent, for small steps in scale δ μ / μ infinitesimal contact terms ~ δ α are induced, that are then absorbed back into other couplings by the contact terms. This modifies the β -functions in the Einstein frame. In conclusion, we show how correct results can be obtained in a simple model by including this effect.
Vacuum energy density and gravitational entropy
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Updated analysis of near-threshold heavy quarkonium production for probe of proton’s gluonic gravitational form factors
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Iteratively comparing gravitational-wave observations to the evolution of massive stellar binaries
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