A1 Journal article (refereed)
Λ3H and Λ‾3H‾ lifetime measurement in Pb–Pb collisions at √sNN = 5.02 TeV via two-body decay (2019)

ALICE Collaboration (2019). Λ3H and Λ‾3H‾ lifetime measurement in Pb–Pb collisions at √sNN = 5.02 TeV via two-body decay. Physics Letters B, 797, 134905. DOI: 10.1016/j.physletb.2019.134905

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2019

Volume: 797

Article number: 134905

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2019.134905

Open Access: Publication published in an open access channel

Publication channel open access:

Publication open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/65675

Publication is parallel published: http://hdl.handle.net/11368/2948926


An improved value for the lifetime of the (anti-)hypertriton has been obtained using the data sample of Pb–Pb collisions at sNN=5.02 TeV collected by the ALICE experiment at the LHC. The (anti-)hypertriton has been reconstructed via its charged two-body mesonic decay channel and the lifetime has been determined from an exponential fit to the dN/d(ct) spectrum. The measured value, τ=242−38 +34 (stat.) ± 17 (syst.) ps, is compatible with representative theoretical predictions, thus contributing to the solution of the longstanding hypertriton lifetime puzzle.

Keywords: particle physics; nuclear physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2

Last updated on 2021-02-02 at 09:56