Abstract
Most calculations on the lifetime of (anti)hypertriton gave a similar lifetime which is close to the lifetime of free Λ decays. However, recent measurements on (anti)hypertriton lifetime demonstrate a much short lifetime. All results for (anti)hypertriton lifetime by two-body decay channel of 3 He + π for Au+Au collision at RHIC, Pb+Pb collision at LHC and Li + C collisions at GSI show a significant short lifetime in comparison with lifetime of free Λ decays. However, theoretical interpretation remains puzzle. Hypernucleus provides an ideal environment to learn the hyperonnucleon interaction, which is responsible partly for the binding of hypernuclei and lifetime. Therefore, a meaurement of the precise lifetime of hypernucleus could provide a tool to investigate of hyeron-nucleon interaction [1–7]. The most simple hypernucleus is hypertriton, which is a bound state of a proton, a neutron, and a hyperon (Λ or Ξ), it is bound with respect to the Λ
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