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

Research output: Contribution to journalArticle

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. © 2019 The Author

Details

Authors
Organisations
External organisations
  • University of Copenhagen
  • Variable Energy Cyclotron Centre
  • University of Brescia
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number134905
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume797
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes