A1 Journal article (refereed)
Measurement of the Lifetime and Λ Separation Energy of 3ΛH (2023)

ALICE Collaboration. (2023). Measurement of the Lifetime and Λ Separation Energy of 3ΛH. Physical Review Letters, 131, Article 102302. https://doi.org/10.1103/PhysRevLett.131.102302

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Publication year: 2023

Publication date: 05/09/2023

Volume: 131

Article number: 102302

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevLett.131.102302

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/89254

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2209.07360

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.

Free keywords: nuclear physics

Contributing organizations

Related projects

Ministry reporting: Yes

Reporting Year: 2023

JUFO rating: 3