Lars Haur

≈ 510.9989461 keV/c^2
≈ 5.44617017×10^-4 m_p (proton masses)
≈ 9.109383632×10^-31 kg (kilograms)

≈ -1.602×10^-19 C (coulombs)

lepton

spin-parity (J^π) | 1/2^+
electric charge (Q) | -1
strangeness (S) | 0
hypercharge (Y) | 0

mean lifetime | ∞
half-life | ∞
width | 0 MeV (megaelectronvolts)

antiparticle | e^+ (positron)

e^- + e^+ ⟶ anything