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   https://doi.org/10.1016/j.nuclphysa.2022.122424  

   Lin, Wilson; Wilkinson, John T.; Barrett, Kendall E.; Barnhart, Todd E.; Gott, Matthew; Becker, Kaelyn V.; Clark, Adam M.; Miller, Anthony; Brown, Gunnar; DeLuca, Molly; et al (May 2022, Nuclear Physics A)
2. High precision 5 MeV Mott polarimeter

   https://doi.org/10.1103/PhysRevC.102.015501  

   Grames, J. M.; Sinclair, C. K.; Poelker, M.; Roca-Maza, X.; Stutzman, M. L.; Suleiman, R.; Mamun, Md. A.; McHugh, M.; Moser, D.; Hansknecht, J.; et al (July 2020, Physical Review C)
3. The cosmology of sub-MeV dark matter

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4. MeV Electron Precipitation During Radiation Belt Dropouts

   https://doi.org/10.1029/2024JA032759  

   Freund, Domenique; Blum, Lauren; Vidal‐Luengo, Sergio; Bruno, Alessandro; Kataoka, Ryuho (August 2024, Journal of Geophysical Research: Space Physics)

   Abstract To gain deeper insights into radiation belt loss into the atmosphere, a statistical study of MeV electron precipitation during radiation belt dropout events is undertaken. During these events, electron intensities often drop by an order of magnitude or more within just a few hours. For this study, dropouts are defined as a decrease by at least a factor of five in less than 8 hours. Van Allen probe measurements are employed to identify dropouts across various parameters, complemented by precipitation data from the CALorimetric Electron Telescope instrument on the International Space Station. A temporal analysis unveils a notable increase in precipitation occurrence and intensity during dropout onset, correlating with the decline of SYM‐H, the north‐south component of the interplanetary magnetic field, and the peak of the solar wind dynamic pressure. Moreover, dropout occurrences show correlations with the solar cycle, exhibiting maxima at the spring and autumn equinoxes. This increase during equinoxes reflects the correlation between equinoxes and the SYM‐H index, which itself exhibits a correlation with precipitation during dropouts. Spatial analysis reveals that dropouts with precipitation penetrate into lower L‐star regions, mostly reaching L‐star <4, while most dropouts without precipitation don't penetrate deeper than L‐star 5. This is consistent with the larger average dimensions of dropouts associated with precipitation. During dropouts, precipitation is predominantly observed in the dusk‐midnight sector, coinciding with the most intense precipitation events. The results of this study provide insight into the contribution of precipitation to radiation belt dropouts by deciphering when and where precipitation occurred. 

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5. Testable flavored TeV-scale resonant leptogenesis with MeV-GeV dark matter in a neutrinophilic two-Higgs-doublet model

   https://doi.org/10.1103/b5sk-5f3d  

   Huang, Peisi; Zhang, Kairui (June 2025, Physical Review D)

   We explore flavored resonant leptogenesis embedded in a neutrinophilic two-Higgs-doublet model. Successful leptogenesis is achieved by the very mildly degenerate two heavier right-handed neutrinos (RHNs) 𝑁2 and 𝑁3 with a level of only Δ⁢𝑀32/𝑀2∼𝒪⁡(0.1%–1%). The lightest RHN, with a MeV–GeV mass, lies below the sphaleron freeze-out temperature and is stable, serving as a dark matter candidate. The model enables TeV-scale leptogenesis while avoiding the extreme mass degeneracy typically plaguing conventional resonant leptogenesis. Baryon asymmetry, neutrino masses, and potentially even dark matter relic density can be addressed within a unified, experimentally testable framework. 

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