HΛ3 and H‾Λ‾3 lifetime measurement in Pb–Pb collisions at sNN=5.02 TeV via two-body decay

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T1 - HΛ3 and H‾Λ‾3 lifetime measurement in Pb–Pb collisions at sNN=5.02 TeV via two-body decay

AU - ALICE Collaboration

AU - Acharya, S

AU - Adolfsson, Jonatan

AU - Christiansen, Peter

AU - Matonoha, Oliver

AU - Nassirpour, Adrian

AU - Oskarsson, Anders

AU - Richert, Tuva

AU - Vazquez Rueda, Omar

AU - Silvermyr, David

AU - Stenlund, Evert

AU - Zurlo, N

PY - 2019

Y1 - 2019

N2 - 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. © 2019 The Author

AB - 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. © 2019 The Author

U2 - 10.1016/j.physletb.2019.134905

DO - 10.1016/j.physletb.2019.134905

M3 - Article

VL - 797

JO - Physics Letters B

T2 - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

M1 - 134905

ER -