Λ3H and Λ‾3H‾ lifetime measurement in Pb–Pb collisions at √sNN = 5.02 TeV via two-body decay
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
Published inPhysics Letters B
© 2019 The Author
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.