charm quark
E674925
The charm quark is a second-generation elementary particle with electric charge +2/3, playing a key role in the structure of hadrons and in understanding flavor physics and weak interactions in the Standard Model.
Statements (65)
| Predicate | Object |
|---|---|
| instanceOf |
elementary particle
ⓘ
quark ⓘ second-generation quark ⓘ |
| antiparticle | anticharm quark ⓘ |
| associatedBaryon |
Λ_c baryon
NERFINISHED
ⓘ
Ξ_c baryon ⓘ Ω_c baryon ⓘ |
| associatedMeson |
D meson
NERFINISHED
ⓘ
D_s meson NERFINISHED ⓘ J/ψ meson NERFINISHED ⓘ |
| baryonNumber | +1/3 ⓘ |
| belongsToFamily | up-type quarks ⓘ |
| canTransformInto |
bottom quark (via higher-order processes)
ⓘ
down quark ⓘ strange quark ⓘ |
| CKMMatrixElement |
V_cb
ⓘ
V_cd NERFINISHED ⓘ V_cs ⓘ |
| colorCharge | quantum chromodynamics color charge ⓘ |
| confinementProperty | cannot be isolated as a free particle at low energies ⓘ |
| decaysVia |
W boson emission
ⓘ
charged weak current ⓘ |
| discoveredBy |
Burton Richter
NERFINISHED
ⓘ
Samuel C. C. Ting NERFINISHED ⓘ |
| discoveryEvent | November Revolution NERFINISHED ⓘ |
| discoveryFacility |
Brookhaven National Laboratory
NERFINISHED
ⓘ
SLAC NERFINISHED ⓘ |
| discoveryMethod | electron–positron annihilation experiments ⓘ |
| discoveryYear | 1974 ⓘ |
| electricCharge |
+2/3 e
ⓘ
0.6666667 e ⓘ |
| flavorQuantumNumber | charmness +1 ⓘ |
| formsBoundStatesWith |
anticharm quark
ⓘ
bottom quark ⓘ charm quark ⓘ down quark ⓘ strange quark NERFINISHED ⓘ up quark ⓘ |
| formsHadrons |
charmed baryons
ⓘ
charmed mesons NERFINISHED ⓘ |
| gaugeGroupRepresentation |
doublet of SU(2)_L (with strange quark)
ⓘ
triplet of SU(3)_color ⓘ |
| generation | second generation ⓘ |
| helicityStates |
left-handed
ⓘ
right-handed ⓘ |
| interaction |
electromagnetic interaction
ⓘ
gravitational interaction ⓘ strong interaction ⓘ weak interaction ⓘ |
| leptonNumber | 0 ⓘ |
| mass | about 1.27 GeV/c^2 ⓘ |
| massScheme | MS-bar scheme at 2 GeV ⓘ |
| namedAfter | charm quantum number ⓘ |
| partOf |
Standard Model of particle physics
NERFINISHED
ⓘ
second quark generation ⓘ |
| PDGParticleID | 4 ⓘ |
| roleInCosmology | relevant in early-universe high-temperature plasma ⓘ |
| roleInPhysics |
CP violation studies
ⓘ
flavor physics ⓘ tests of the Standard Model ⓘ |
| spin | 1/2 ⓘ |
| statistics | Fermi–Dirac statistics NERFINISHED ⓘ |
| symbol | c ⓘ |
| weakHypercharge | +1/3 (left-handed doublet) ⓘ |
| weakIsospin | +1/2 (left-handed component) ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.