About
The extreme energy densities reached in heavy-ion collisions at the LHC lead to an abundant production of nuclei and antinuclei. Of particular interest among these are the light (anti-)hypernuclei, as the study of their internal structure represents a direct probe to investigate the strong interaction between hyperons and nucleons. This talk is focused on the properties of the lightest known hypernucleus, the hypertriton (3ΛH), which is a bound state of a proton, a neutron and a Λ. The most precise measurements to date of the 3ΛH and anti-3ΛH lifetime τ and Λ separation energy BΛ are obtained using the data sample of Pb-Pb collisions at √sNN = 5.02 TeV collected by ALICE during the Run 2 of the LHC. The 3ΛH is reconstructed via its charged two-body mesonic decay channel (3ΛH→3He+π- + c.c.) and selected with machine learning techniques. The measured values τ = [ 253 ± 11 (stat) ± 6 (syst) ] ps and BΛ = [ 102 ± 63 (stat) ± 67 (syst) ] keV are compatible with predictions from effective field theories and confirm that the3ΛH structure is consistent with an extremely weak bound system.
Refreshments will be served at 10:30 .
0:00:00 Slide 1
0:01:08 Slide 2
0:02:48 Slide 3
0:05:06 Slide 4
0:07:01 Slide 5
0:08:33 Slide 6
0:10:02 Slide 7
0:11:06 Slide 8
0:14:35 Slide 9
0:16:17 Slide 10
The talk
Credits and licence
- Institution
- CERN
- Department
- LHC Seminar
- Speaker
- Francesco Mazzaschi
- Year
- 2023
- 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