Optimization of the (anti-)hyper-nuclei reconstruction in ALICE

ALICE (A Large Ion Collider Experiment) is the heavy-ion experiment at LHC. Relativistic heavy-ion collisions offer unique ways to study the behaviour of nuclear matter. One of them is (anti-)hyper-nuclei. A Hypernucleus is a nucleus which conatains at least one hyperon (a baryon which contains at least one strange quark, but no charm, top or bottom quark) in addition to the nomal proton and neutron. The hypertriton is known as the lightest hypernucleus, and is a bound state of a proton, a neutron and a $\Lambda$. The lifetime of ${_{\Lambda}^{3}H}$ is close to the lifetime of the $\Lambda$ Baryon, however it is still not precisely known and its precise value is still one of the main open questions in modern nuclear physics. The two main decay channels of the hypertriton are ${_{\Lambda}^{3}H}\to{_{}^{3}He}+\pi^{-}$ and ${_{\Lambda}^{3}H}\to d+p+\pi^{-}$. In this study, the two body decay channel of the (anti-)hypertriton is analyzed. So far, ALICE has measured hypertriton only using the two decay products, and the tracking of the charged mother were neglected. The purpose of this study is to improve the reconstruction of the decay by taking into account the charged mother track.