Measurement of the Lifetime and Λ Separation Energy of HΛ3

ALICE Collaboration

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Resumen

The most precise measurements to date of the HΛ3 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 HΛ3 is reconstructed via its charged two-body mesonic decay channel (HΛ3→He3+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 HΛ3 structure is consistent with a weakly bound system.

Idioma originalInglés
Número de artículo102302
PublicaciónPhysical Review Letters
Volumen131
N.º10
DOI
EstadoPublicada - 8 set. 2023

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