Statements (43)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Subatomic particle
Meson |
| gptkbp:antiparticle |
π- is antiparticle of π+
π0 is its own antiparticle |
| gptkbp:chargeConjugation |
π0: +1
|
| gptkbp:color |
colorless
|
| gptkbp:composition |
quark-antiquark pair
|
| gptkbp:contentType |
down and anti-up
up and anti-down up and anti-up / down and anti-down (for π0) |
| gptkbp:CPParity |
π0: +1
|
| gptkbp:discoveredBy |
gptkb:Cecil_Powell
|
| gptkbp:discoveredIn |
1947
|
| gptkbp:family |
hadron
|
| gptkbp:firstObserved |
gptkb:University_of_Bristol
|
| gptkbp:foundIn |
gptkb:particle_accelerators
cosmic rays |
| https://www.w3.org/2000/01/rdf-schema#label |
Pions
|
| gptkbp:interactsWith |
gptkb:weak_interaction
electromagnetic interaction strong interaction |
| gptkbp:isospin |
1
|
| gptkbp:lifespan |
2.6×10^-8 s (π+ and π-)
8.4×10^-17 s (π0) |
| gptkbp:mass |
135.0 MeV/c^2 (π0)
139.6 MeV/c^2 (π+ and π-) |
| gptkbp:mode |
muon and neutrino (π+ and π-)
two photons (π0) |
| gptkbp:namedAfter |
Greek letter pi (π)
|
| gptkbp:par |
-1
|
| gptkbp:range |
+1
0 -1 |
| gptkbp:role |
mediator of strong nuclear force (Yukawa interaction)
|
| gptkbp:spin |
0
|
| gptkbp:statistic |
boson
|
| gptkbp:symbol |
π
π+ π- π0 |
| gptkbp:uses |
medical physics (pion therapy)
study of strong force study of weak interactions |
| gptkbp:bfsParent |
gptkb:Glueball
|
| gptkbp:bfsLayer |
6
|