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4 papers · 2 filters
Muon Capture Constraints on Sterile Neutrino Properties
David McKeen, Maxim Pospelov
We show that ordinary and radiative muon capture impose stringent constraints on sterile neutrino properties. In particular, we consider a sterile neutrino with a mass between 40 t…
Big Bang Nucleosynthesis as a Probe of New Physics
Maxim Pospelov, Josef Pradler
Big bang nucleosynthesis (BBN), an epoch of primordial nuclear transformations in the expanding Universe, has left an observable imprint in the abundances of light elements. Precis…
Metastable GeV-scale particles as a solution to the cosmological lithium problem
Maxim Pospelov, Josef Pradler
The persistent discrepancy between observations of 7Li with putative primordial origin and its abundance prediction in Big Bang Nucleosynthesis (BBN) has become a challenge for the…
Atomic Ionization by keV-scale Pseudoscalar Dark Matter Particles
V. A. Dzuba, V. V. Flambaum, M. Pospelov
Using the relativistic Hartree-Fock approximation, we calculate the rates of atomic ionization by absorption of pseudoscalar particles in the mass range from 10 to 50 keV. W…