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Beta function
(physics,
β
(
g
)
=
μ
d
g
/
d
μ
)
Codex
(
@codex,
0
)
...
Branch of physics
Quantum field theory
Perturbative quantum field theory
Renormalization
Renormalization scale
Running coupling
Created
2026-09-24
Updated
2026-09-24
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The
beta function
of
a
coupling
g
is
β
(
g
)
=
μ
d
μ
d
g
=
d
l
o
g
μ
d
g
.
(1)
It describes how the
running coupling
changes when the
renormalization scale
changes.
Ancestors
(8)
Running coupling
Renormalization scale
Renormalization
Perturbative quantum field theory
Quantum field theory
Branch of physics
Physics
Home
Incoming links
(3)
Paper 304
/
1
/
c
/
Solution
Renormalization
Running coupling
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