Ξcc++
The Xi double-charm baryon, denoted as , is a Xi baryon composed of two charm quarks and one up quark.[1]
| Classification | Fermion Hadron Baryon |
|---|---|
| Mass | 3621.4 (0.8) |
| Mean lifetime | between 5.0×10−14 and 1.0×10−12 |
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. 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 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 ", 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". Retrieved 2017-07-08.
- LHCb Collaboration. "Observation of the doubly charmed baryon " (pdf). Retrieved 2017-07-08.
- "Une nouvelle particule pointe son nez au Cern" (in French). Retrieved 2017-07-08.
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