Addressing the hypertriton lifetime puzzle with ALICE at the LHC

作者：Trogolo Stefano; Acharya S; Acosta F T; Adamova D; Adolfsson J; Aggarwal M M; Rinella G Aglieri; Agnello M; Agrawal N; Ahammed Z; Ahn S U; Aiola S; Akindinov A; Al Turany M; Alam S N; Albuquerque D S D; Aleksandrov D; Alessandro B; Alfaro Molina R; Ali Y; Alici A; Alkin A; Alme J; Alt T; Altenkamper L; Altsybeev I; Anaam M N; Andrei C; Andreou D; Andrews H A; Andronic A; Angeletti M; Anguelov V; Anson C; Anticic T; Antinori F; Antonioli P; Anwar R; Apadula N; Aphecetche L; Appelshaeuser H

来源：Nuclear Physics A, 2019, 982: 815-818.

DOI：10.1016/j.nuclphysa.2018.11.016

• Heavy-ion collisions
• hypertriton production
• lifetime

The ALICE Collaboration collected a large data sample of Pb-Pb collisions at root S-NN = 5.02 TeV in 2015 at the Large Hadron Collider (LHC) and the excellent particle identification (PID) capabilities allow for the detection of rarely produced (anti-)hypernuclei. In particular, the (anti-)hypertriton, H-3(Lambda), which is a bound state of a proton, a neutron and a A, is the lightest known hypernucleus.
The results on the H-3(Lambda) production are compared with the predictions from a model based on coalescence approach and from statistical-thermal models to investigate the production mechanisms in heavy-ion collisions. Emphasis will also be put on the latest and more precise determination of the H-3(Lambda) lifetime.

• 出版日期2019-2
• 单位中国科学院上海应用物理研究所; 华中师范大学; 中国原子能科学研究院