Baryons from evaporating primordial black holes reduce primordial ^7Li abundance to observed values via neutron capture converting it to ^4He.
Low-energy Antiproton Interaction with Helium
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abstract
An ab initio potential for the interaction of the neutral helium atom with antiprotons and protons is calculated using the Born-Oppenheimer approximation. Using this potential, the annihilation cross section for antiprotons in the energy range 0.01 microvolt to 1 eV is calculated.
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2026 1verdicts
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Possible explanation of primordial $^7$Li deficit
Baryons from evaporating primordial black holes reduce primordial ^7Li abundance to observed values via neutron capture converting it to ^4He.