Hiperon
Hiperon je barion, ki vsebuje en ali več kvarkov s, nima pa kvarkov c niti kvarkov b. V njihovo sestavo vstopa najmanj en kvark s. Sodelujejo v močnih interakcijah.
Hiperoni tako spadajo med hadrone in fermione (pokoravajo se Fermi-Diracovi statistiki).
Vrste hiperonov
Med hiperoni so trije hiperoni z oznako Σ (Σ+, Σ0 in Σ- – glej dekuplet barionov).
Dva hiperona imata oznako Ξ (Ξ- in Ξ0).
Znan je samo en hiperon z oznako Λ (Λ0 – glej oktet barionov).
Znan je tudi samo en hiperon z oznako Ω (Ω- – glej dekuplet barionov).
Seznam hiperonov
V naslednji preglednici so navedene nekatere lastnosti hiperonov:
| delec | oznaka | sestava | mirovna masa MeV/c² |
izospin I |
spin(parnost) JP |
q | S | C | B' | srednja življenjska doba s |
običajen razpad |
|---|---|---|---|---|---|---|---|---|---|---|---|
| barion Λ [1] | Λ0 | uds | 1 115,683(6) | 0 | 1/2+ | 0 | −1 | 0 | 0 | 2,60. 10-10 [2] | p+ + π- ali n0 + π0 |
| barion Σ [3] | Σ+ | uus | 1 189,37(0,7) | 1 | 1/2+ | +1 | −1 | 0 | 0 | 8,018.10-11 | p+ + π0 ali ns0 + π+ |
| barion Σ [4] | Σ0 | uds | 1 192,642(24) | 1 | ½+ | 0 | −1 | 0 | 0 | 7,4.10-20 | Λ+ + γ |
| barion Σ [5] | Σ- | dds | 1 197,449(30) | 1 | 1/2+ | −1 | −1 | 0 | 0 | 1,479.10-10 | n0 + π- |
| barion Σ resonanca [6] | Σ+(1385) | uus | 1 382,8(4) | 1 | 3/2+ | +1 | −1 | 0 | 0 | Λ + π ali Σ + π | |
| barion Σ resonanca [6] | Σ0(1385) | uds | 1 383,7±1,0 | 1 | 3/2+ | 0 | −1 | 0 | 0 | Λ + π ali Σ + π | |
| barion Σ resonanca [6] | Σ-(1385) | dds | 1 387,2(5) | 1 | 3/2+ | −1 | −1 | 0 | 0 | Λ + π ali Σ + π | |
| barion Ξ [7] | Ξ0 | uss | 1 314,83(20) | 1/2 | ½+ | 0 | −2 | 0 | 0 | (2,90±0,09).10-10 | Λ0 + π0 |
| barion Ξ [8] | Ξ- | dss | 1 321,31(13) | 1/2 | 1/2+ | −1 | −2 | 0 | 0 | (1,639±0,015).10-10 | Λ0 + π- |
| barion Ξ resonanca [9] | Ξ0(1530) | uss | 1 531,80(32) | 1/21⁄2 | 1/2+3⁄2+ | 0 | −2 | 0 | 0 | Ξ + π | |
| barion Ξ resonanca [9] | Ξ-(1530) | dss | 1 535,0(6) | 1/21⁄2 | 1/2 + | −1 | −2 | 0 | 0 | Ξ + π | |
| barion Ω [10] | Ω- | sss | 1 672,45(29) | 0 | 3/2+ | −1 | −3 | 0 | 0 | (8,21±011).10-11 | Λ0 + K- ali Ξ0 + π- ali |
Opombe in sklici
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Lambda« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Physics Particle Overview - Baryons«. Arhivirano iz prvotnega spletišča dne 28. februarja 2008. Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Sigma+« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Sigma0« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Sigma-« (PDF). Pridobljeno 20. aprila 2008.
- ↑ 6,0 6,1 6,2 »Particle Data Groups: 2006 Review of Particle Physics - Sigma(1385)« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Xi0« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Xi-« (PDF). Pridobljeno 20. aprila 2008.
- ↑ 9,0 9,1 »Particle Data Groups: 2006 Review of Particle Physics - Xi(1530)« (PDF). Pridobljeno 20. aprila 2008.
- ↑ »Particle Data Groups: 2006 Review of Particle Physics - Omega-« (PDF). Pridobljeno 20. aprila 2008.
| Mednarodno | |
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| Nacionalno | |
| Drugo | |
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