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Pion

In particle physics, a pion (/ˈpaɪ.ɒn/, PIE-on) or pi meson, denoted with the Greek letter pi (π), is any of three subatomic particles: π0, π+, and π−. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions π+ and π−…

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Antiparticle
π+ : π− · π0 : self
C parity
+1
Charge radius
π± : ±0.659(4) fm‍
Color charge
0
Composition
π+ : ud · π0 : u u ¯ − d d ¯ 2 {\displaystyle {\rm {\tfrac {u{\overline {u}}-d{\overline {d}}}{\sqrt {2}}}}} · π− : du
Discovered
π± : Bibha Chowdhuri, Debendra Mohan Bose (1942) · π0 : 1950

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Map overview Semantic statistics

Pion

Nodes137
Edges136
Triples105
Avg. degree1.99
Density0.014599
Components1

How this topic connects Entity context

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Pion

Top relations

related to history · 38
Pion → Although, Andes Mountains, Bibha Chowdhuri, Bigorre, Bose, Bose Institute, Both, Bristol, Cecil Powell, Chacaltaya, Chowdhuri, Debendra Mohan Bose, England, From, Hideki Yukawa, However, In, Initially, Irene Roberts, Marietta Kurz
related to overview · 10
Pion → Gell-Mann, GMOR, Goldstone, If, In, Oakes, Renner, That, The, This
has application · 7
Pion → British Columbia, Los Alamos National Laboratory's, Meson Physics Facility, New Mexico, The, TRIUMF, Vancouver
related to Basic properties · 6
Pion → Each, In, Iz, Pions, The, Together
related to Charged pion decays · 5
Pion → CERN, MeV/c2, The, They, This
related to External links · 5
Pion → Media, Particle Data Group, Pions, Wikimedia CommonsMesons, Wiktionary-logo-en-v2
related to Neutral pion decays · 4
Pion → BRγγ, It, MeV/c2, The
Composition · 3
Pion → π+ : ud, π0 : u u ¯ − d d ¯ 2 {\displaystyle {\rm {\tfrac {u{\overline {u}}-d{\overline {d}}}{\sqrt {2}}}}}, π− : du
see also · 3
Pion → Standard, Standard ModelPioniumQuark, Wang
Antiparticle · 2
Pion → π+ : π−, π0 : self

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Important terminology

pions decay also meson neutral π0 mesons charged quark muon interaction mass 10 strong pi particle particles displaystyle mev rays

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
PionAntiparticleπ+ : π−1.00infobox
PionAntiparticleπ0 : self1.00infobox
PionC parity+11.00infobox
PionCharge radiusπ± : ±0.659(4) fm‍1.00infobox
PionColor charge01.00infobox
PionCompositionπ+ : ud1.00infobox
PionCompositionπ0 : u u ¯ − d d ¯ 2 {\displaystyle {\rm {\tfrac {u{\overline {u}}-d{\overline {d}}}{\sqrt {2}}}}}1.00infobox
PionCompositionπ− : du1.00infobox
PionDiscoveredπ± : Bibha Chowdhuri, Debendra Mohan Bose (1942)1.00infobox
PionDiscoveredπ0 : 19501.00infobox
PionElectric chargeπ± : ±1 e1.00infobox
PionElectric chargeπ0 : 0 e1.00infobox
PionFamilyMesons1.00infobox
PionHypercharge01.00infobox
PionInteractionsStrong, weak, electromagnetic, and gravity1.00infobox
PionIsospinπ± : ±11.00infobox
PionIsospinπ0 : 01.00infobox
PionMassπ± : 139.57039(18) MeV/c2‍1.00infobox
PionMassπ0 : 134.9768(5) MeV/c2‍1.00infobox
PionMean lifetimeπ± : 2.6×10−8 s1.00infobox
PionMean lifetimeπ0 : 8.5×10−17 s1.00infobox
PionParity−11.00infobox
PionSpin0 ħ1.00infobox
PionStatisticsBosonic1.00infobox
PionSymbolπ+ , π0 , and π−1.00infobox
PionTheorizedHideki Yukawa (1935)1.00infobox
PionTypes31.00infobox

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