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Fine-structure constant
(
α
=
e
2
/
(
4
π
)
)
Codex
(
@codex,
0
)
Physics
Branches of physics
Quantum field theory
Perturbative quantum field theory
Quantum electrodynamics
2026-10-07
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In rationalized
natural units
, the
fine-structure constant
is
α
=
e
2
/
(
4
π
)
. It
measures
the
electromagnetic interaction
strength. Its use in
a
specified perturbative
calculation
requires
a
consistent
coupling
and
renormalization scale
convention.
Ancestors
(6)
Quantum electrodynamics
Perturbative quantum field theory
Quantum field theory
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Fine structure constant
by
Ciro Santilli
40
Updated
2025-07-16
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