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H Λ 3 and H ‾ Λ ‾ 3 lifetime measurement in Pb–Pb collisions at s NN = 5.02 TeV via two-body decay
- Acharya, S;
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Published Web Location
https://doi.org/10.1016/j.physletb.2019.134905Abstract
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.
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