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Charm-kvark

Charm-kvark
Klassificering
Elementarpartikel
Fermion
Kvark
Generelle egenskaber
Interaktion(er) Gravitation, Elektromagnetisme, Svag og Stærk kernekraft
Symbol c
Antipartikel Anti-charm-kvark
Fysikke egenskaber
Masse 1,2-1,3 GeV/c2 [1]
Elektrisk ladning + 23 e[1]
Farveladning Ja
Spin 12[2]
Levetid 1.1 x 10-12 s[3]
Henfalder til Strange-kvark, Down-kvark[3]
Historie
Forudsagt Glashow (1970)[4]
Iliopoulos (1970)[4]
Maiani (1970)[4]
Opdagelse Richter (1974)[5]
Ting (1974)[5]

Charm-kvark er den tredje tungeste kvark. Den har en masse imellem 1,2 og 1,3 GeV/c2 og en ladning på + 2/3 e.[1] J/Ψ mesonen består af en charm-kvark og en anti-charm-kvark, charm-kvarkens antipartikel. J/Ψ mesonen blev fundet i 1974 på Brookhaven National Laboratory og på Stanford Linear Accelerator Centre og fundet beviste dermed eksistensen af charm-kvarken.[4]

  1. ^ a b c Bryndt Klinkby, Esben (september 2008). "Standardmodellens partikler og kræfter" (pdf). Kvant - tidsskrift for fysik og astronomi. 19 (3): 11-12. Hentet 5. maj 2011.
  2. ^ Quigg, Chris. "Elementarpartikler og kræfter". Arkiveret fra originalen 14. august 2010. Hentet 5. maj 2011.
  3. ^ a b "Transformation of Quark Flavors by the Weak Interaction". Hentet 5. maj 2011. The c quark has about 5% probability of decaying into a d quark instead of an s quark.
  4. ^ a b c d Cartwright, Jon (8. august 2007). "Dirac medal honours charm-quark physicists". physicsworld.com. Arkiveret fra originalen 17. februar 2011. Hentet 5. maj 2011.
  5. ^ a b "Lineær accelerator igen" (PDF). Hentet 5. maj 2011.


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Charm-kvark
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