HΛ3 and H‾Λ‾3 lifetime measurement in Pb–Pb collisions at √sNN = 5.02 TeV via two-body decay
Publication date
2019-10-10
Authors
ALICE Collaboration
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Document Type
Article
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Abstract
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
Nuclear and High Energy Physics
Citation
ALICE Collaboration 2019, 'HΛ3 and H‾Λ‾3 lifetime measurement in Pb–Pb collisions at √s NN = 5.02 TeV via two-body decay', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 797, 134905. https://doi.org/10.1016/j.physletb.2019.134905