Measurement of the Lifetime and Λ Separation Energy of _{Λ}^{3}H.



Acharya, S ORCID: 0000-0002-9213-5329, Adamová, D ORCID: 0000-0002-0504-7428, Adler, A, Aglieri Rinella, G, Agnello, M, Agrawal, N ORCID: 0000-0003-0348-9836, Ahammed, Z ORCID: 0000-0001-5241-7412, Ahmad, S ORCID: 0000-0003-0497-5705, Ahn, SU ORCID: 0000-0001-8847-489X, Ahuja, I ORCID: 0000-0002-4417-1392
et al (show 1033 more authors) (2023) Measurement of the Lifetime and Λ Separation Energy of _{Λ}^{3}H. Physical review letters, 131 (10). 102302-. ISSN 0031-9007, 1079-7114

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Abstract

The most precise measurements to date of the _{Λ}^{3}H lifetime τ and Λ separation energy B_{Λ} are obtained using the data sample of Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV collected by ALICE at the LHC. The _{Λ}^{3}H is reconstructed via its charged two-body mesonic decay channel (_{Λ}^{3}H→^{3}He+π^{-} and the charge-conjugate process). The measured values τ=[253±11(stat)±6(syst)]  ps and B_{Λ}=[102±63(stat)±67(syst)]  keV are compatible with predictions from effective field theories and confirm that the _{Λ}^{3}H structure is consistent with a weakly bound system.

Item Type: Article
Uncontrolled Keywords: ALICE Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 03 Oct 2023 15:16
Last Modified: 06 Dec 2024 18:29
DOI: 10.1103/physrevlett.131.102302
Open Access URL: https://doi.org/10.1103/PhysRevLett.131.102302
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3173372