Physics:Ξcc++
From HandWiki
| Classification | Hadron Baryon |
|---|---|
| Statistics | Fermion |
| Mass | 3621.4 MeV |
| mean lifetime | between 5.0×10−14 and 1.0×10−12 |
The Xi double-charm baryon, denoted as [math]\displaystyle{ \Xi_{\rm{cc}}^{{++}} }[/math], is a Xi baryon composed of two charm quarks and one up quark.[1]
Its discovery by the LHCb Collaboration was announced on 6 July 2017 in Venice, Italy, at the European Physical Society Conference on High Energy Physics. [math]\displaystyle{ \Xi_{\rm{cc}}^{{++}} }[/math] is the first baryon discovered with two heavy quarks (charm and/or bottom) and a light quark. Its mass is 3621 MeV, nearly four times that of the proton.[2]
It was identified when it disintegrated into a [math]\displaystyle{ \Lambda_{\rm{c}}^{{+}} }[/math] baryon and three lighter mesons, K–, π+ and π+.
See also
References
- ↑ Sébastien Gavois (Nextinpact.com) (2017-07-10), Retour en douceur sur la découverte d'une nouvelle particule, avec deux quarks " charmés ", https://press.cern/press-releases/2017/07/lhcb-experiment-charmed-announce-observation-new-particle-two-heavy-quarks, retrieved 2017-07-10
- ↑ (CERN, European Organization for Nuclear Research 2017)
Bibliography
- European Organization for Nuclear Research (CERN). "The LHCb experiment is charmed to announce observation of a new particle with two heavy quarks" (in en). https://press.cern/press-releases/2017/07/lhcb-experiment-charmed-announce-observation-new-particle-two-heavy-quarks. Retrieved 2017-07-08.
- LHCb Collaboration. "Observation of the doubly charmed baryon [math]\displaystyle{ \Xi_{\rm{cc}}^{{++}} }[/math]" (in en) (pdf). http://lhcb-public.web.cern.ch/lhcb-public/Images2017/LHCb-PAPER-2017-018.pdf. Retrieved 2017-07-08.
- "Une nouvelle particule pointe son nez au Cern" (in fr). https://www.sciencesetavenir.fr/fondamental/une-nouvelle-particule-pointe-son-nez-au-cern_114585. Retrieved 2017-07-08.
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