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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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Prospects for γ ⋆ γ ⋆ → π π via lattice QCD
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Asymmetric matter from a dark first-order phase transition
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Evolution of charm-meson ratios in an expanding hadron gas
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Measuring the Migdal effect in semiconductors for dark matter detection
The Migdal effect has received much attention from the dark matter direct detection community, in particular due to its power in setting leading limits on sub-GeV particle dark matter. However, it is crucial to obtain experimental confirmation of the Migdal effect through nuclear scattering using Standard Model probes. In this work, we extend existing calculations of the Migdal effect to the case of neutron-nucleus scattering, with a particular focus on neutron scattering angle distributions in silicon. We identify kinematic regimes wherein the assumptions present in current calculations of the Migdal effect hold for neutron scattering and demonstrate that these include viable neutron calibration schemes. We then apply this framework to propose an experimental strategy to measure the Migdal effect in cryogenic silicon detectors using an upgrade to the NEXUS facility at Fermilab.
Background determination for the LUX-ZEPLIN dark matter experiment
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Khuri-Treiman analysis of J / ψ → π + π − π 0
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Neutrino constraints and the ATOMKI X17 anomaly
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Energetic long-lived particles in the CMS muon chambers
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Confronting the axial-vector form factor from lattice QCD with MINERvA antineutrino-proton data
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New constraints on ALP couplings to electrons and photons from ArgoNeuT and the MiniBooNE beam dump
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Measurements of the ν μ and ν ¯ μ -induced coherent charged pion production cross sections on C 12 by the T2K experiment
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Broadening of particle distributions in electron-, neutrino-, and antineutrino-nucleus scattering from QED interactions
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Uncertainties on the EFT coupling limits for direct dark matter detection experiments stemming from uncertainties of target properties
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Gravitational production of spin-3/2 particles during reheating
We compute the density of a spin-$\frac{3}{2}$ particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate as the source of this production, mediated by the exchange of a graviton. This production greatly exceeds the gravitational production from the emergent thermal bath during reheating. The relic abundance limit sets an absolute minimum mass for a stable raritron, though there are also model-dependent constraints imposed by unitarity. We also examine the case of gravitational production of a gravitino, taking into account the goldstino evolution during reheating. We compare these results with conventional gravitino production mechanisms.
Equilibration of quantum many-body fast neutrino flavor oscillations
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Uncertainties on the ν ( − ) e / ν ( − ) μ and ν e / ν ¯ e cross-section ratio from the modeling of nuclear effects at 0.2 to 1.2 GeV neutrino energies and their impact on neutrino oscillation experiments
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