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 1⁄4 5.02 TeV collected by ALICE at the LHC. The ΛH is reconstructed via its charged two-body mesonic decay channel (3ΛH → 3He þ π− and the charge-conjugate process). The measured values τ 1⁄4 1⁄2253  11ðstatÞ  6ðsystÞ ps and BΛ 1⁄4 1⁄2102  63ðstatÞ  67ðsystÞ 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

Barile, F.
Membro del Collaboration Group
;
Colella, D.
Membro del Collaboration Group
;
Di Bari, D.
Membro del Collaboration Group
;
Mazzilli, M.
Membro del Collaboration Group
;
Volpe, G.
Membro del Collaboration Group
;
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 1⁄4 5.02 TeV collected by ALICE at the LHC. The ΛH is reconstructed via its charged two-body mesonic decay channel (3ΛH → 3He þ π− and the charge-conjugate process). The measured values τ 1⁄4 1⁄2253  11ðstatÞ  6ðsystÞ ps and BΛ 1⁄4 1⁄2102  63ðstatÞ  67ðsystÞ keV are compatible with predictions from effective field theories and confirm that the 3ΛH structure is consistent with a weakly bound system.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/487264
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