The most precise measurements to date of the 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 at the LHC. The 3ΛH is reconstructed via its charged two-body mesonic decay channel (3ΛH → 3He + π− and the charge-conjugate process). 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 the 3ΛH structure is consistent with a weakly bound system.
Measurement of the Lifetime and Λ Separation Energy of 3ΛH
Camerini, P.;Contin, G.;De Martin, C.;Fragiacomo, E.;Luparello, G.;Margagliotti, G. V.;Piano, S.;Rui, R.;Suljic, M.;Urioni, M.;Zaccolo, V.;
2023-01-01
Abstract
The most precise measurements to date of the 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 at the LHC. The 3ΛH is reconstructed via its charged two-body mesonic decay channel (3ΛH → 3He + π− and the charge-conjugate process). 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 the 3ΛH structure is consistent with a weakly bound system.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
PRL_131(2023)102302_1-13.pdf
accesso aperto
Tipologia:
Documento in Versione Editoriale
Licenza:
Creative commons
Dimensione
15.98 MB
Formato
Adobe PDF
|
15.98 MB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.