About
We report the observation of a narrow structure, X(5568), in the decay sequence X(5568) → Bs π±, Bs → J/ψ ϕ, J/ψ → μ+μ−, ϕ → K+K−. This is the first observation of a hadronic state with valence quarks of four different flavors. The mass and natural width of the new state are measured to be m = 5567.8 ± 2.9 (stat) +0.9−1.9 (syst) MeV and Γ = 21.9 ± 6.4 (stat) +5.0−2.5 (syst) MeV, and the significance including look-elsewhere effect and systematic uncertainties is 5.1σ. The observation is based on10.4 fb−1 of ppbar collision data at 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. .
0:00:00 Slide 1
0:01:58 Slide 2
0:04:34 Slide 3
0:06:43 Slide 4
0:09:08 Slide 5
0:11:21 Slide 6
0:12:59 Slide 7
0:15:33 Slide 8
0:16:54 Slide 9
0:18:04 Slide 10
0:19:49 Slide 11
The talk
Credits and licence
- Institution
- CERN
- Department
- EP Seminar
- Speaker
- Alexey Drutskoy
- Year
- 2016
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed