Weinberg angle
E140688
The Weinberg angle, also known as the weak mixing angle, is a fundamental parameter in the electroweak theory that quantifies the mixing of electromagnetic and weak forces and determines the relative strengths of their interactions.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Weinberg angle canonical | 2 |
| weak mixing angle | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
electroweak parameter
ⓘ
parameter of the Standard Model ⓘ physical constant ⓘ |
| alsoKnownAs |
Weinberg angle
ⓘ
surface form:
weak mixing angle
|
| appearsIn |
W boson couplings
ⓘ
Z boson couplings ⓘ charged current interactions ⓘ electroweak unification ⓘ fermion neutral current couplings ⓘ neutral current interactions ⓘ |
| crucialFor |
prediction of W and Z boson masses
ⓘ
structure of neutral current interactions ⓘ |
| defines |
Z boson
ⓘ
surface form:
Z boson field Z_μ
mixing of W^3 and B gauge fields ⓘ photon field A_μ ⓘ |
| definesMixingOf |
electromagnetic interaction
ⓘ
weak interaction ⓘ |
| determines | relative strength of weak and electromagnetic interactions ⓘ |
| field |
Salam–Weinberg model
ⓘ
surface form:
electroweak theory
particle physics ⓘ |
| hasApproximateValue | sin^2 θ_W ≈ 0.23 at the Z boson mass scale ⓘ |
| introducedInContextOf | electroweak unification theory ⓘ |
| mathematicalRelation |
A_μ = B_μ cos θ_W + W^3_μ sin θ_W
ⓘ
Z_μ = -B_μ sin θ_W + W^3_μ cos θ_W ⓘ e = g sin θ_W ⓘ e = g' cos θ_W ⓘ sin^2 θ_W = 1 - (M_W^2 / M_Z^2) ⓘ tan θ_W = g'/g ⓘ |
| measuredAt |
Large Electron–Positron Collider
ⓘ
surface form:
LEP collider
SLD experiment ⓘ |
| measuredIn | electroweak precision experiments ⓘ |
| measuredUsing |
atomic parity violation
ⓘ
deep inelastic scattering ⓘ neutrino scattering ⓘ |
| namedAfter | Steven Weinberg ⓘ |
| partOf |
Standard Model
ⓘ
surface form:
Standard Model of particle physics
|
| relatedTo |
SU(2)_L coupling g
ⓘ
U(1)_Y coupling g' ⓘ W boson mass M_W ⓘ Z boson mass M_Z ⓘ electric charge e ⓘ |
| relatesCouplingsOf |
SU(2)_L
ⓘ
surface form:
SU(2)_L gauge group
U(1) ⓘ
surface form:
U(1)_Y gauge group
|
| scaleDependent | yes ⓘ |
| subjectTo | renormalization group running ⓘ |
| symbol | θ_W ⓘ |
| usedIn |
calculations of parity violation
ⓘ
precision tests of the Standard Model ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
weak mixing angle