V_us
E815589
V_us is the Cabibbo–Kobayashi–Maskawa (CKM) matrix element that quantifies the strength of quark flavor-changing transitions between up and strange quarks in the Standard Model of particle physics.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
CKM matrix element
ⓘ
complex number ⓘ |
| appearsIn | W boson couplings to up and strange quarks ⓘ |
| approximatelyEquals |
Wolfenstein parameter λ
NERFINISHED
ⓘ
sin(Cabibbo angle) ⓘ |
| belongsToTheory | quark mixing in weak interactions ⓘ |
| constrainedBy |
experimental measurements of kaon decays
ⓘ
lattice QCD calculations of hadronic matrix elements ⓘ |
| dependsOn | renormalization scheme for quark fields ⓘ |
| describes | quark flavor-changing transitions between up and strange quarks ⓘ |
| generalizedFrom | Cabibbo mixing between d and s quarks ⓘ |
| governs |
strength of s → u transitions
ⓘ
strength of u → s transitions ⓘ |
| hasApproximateMagnitude |
0.224
ⓘ
0.225 ⓘ |
| hasPhaseConvention | standard CKM phase convention ⓘ |
| hasPhysicalMeaning | probability amplitude for W-mediated u–s transitions ⓘ |
| hasRole | parameter in weak charged-current interactions ⓘ |
| hasUncertaintySource |
experimental systematics in kaon decays
ⓘ
theoretical uncertainties in form factors ⓘ |
| introducedInContextOf | Cabibbo theory of weak interactions NERFINISHED ⓘ |
| isConstrainedBy |
unitarity of first row of CKM matrix
ⓘ
unitarity of second column of CKM matrix ⓘ |
| isElementOf |
first row of CKM matrix
ⓘ
second column of CKM matrix ⓘ |
| isInputTo |
global CKM fits
ⓘ
global electroweak precision fits ⓘ |
| parameterization | Wolfenstein parameter λ NERFINISHED ⓘ |
| partOf |
Cabibbo–Kobayashi–Maskawa matrix
NERFINISHED
ⓘ
Standard Model of particle physics NERFINISHED ⓘ |
| relatedByUnitarityTo |
V_cs
GENERATED
ⓘ
V_tb GENERATED ⓘ V_ts GENERATED ⓘ V_ub GENERATED ⓘ V_ud GENERATED ⓘ |
| relatedTo | Cabibbo angle NERFINISHED ⓘ |
| relatesQuarkFlavors |
strange quark
GENERATED
ⓘ
up quark GENERATED ⓘ |
| satisfies | CKM unitarity relations NERFINISHED ⓘ |
| symbolFor | |V_us| ⓘ |
| usedIn |
CKM unitarity tests
ⓘ
determination of Fermi constant consistency checks ⓘ hyperon decay analyses ⓘ kaon leptonic decay analyses ⓘ kaon semileptonic decay analyses ⓘ tau lepton decay analyses ⓘ |
| usedToProbe | possible physics beyond the Standard Model ⓘ |
| usedToTest | lepton flavor universality in kaon decays ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.