Lifetime of the hypertriton

Hypernuclei and Antihypernuclei Production in Heavy-Ion Collisions

“…Predictions incorporating these considerations are consistent with the world average. In addition, the possible relationship between B Λ and lifetime has been studied in [8,9]. There is active progress both experimentally and theoretically towards a very precise understanding of the 3 Λ H lifetime.…”

Progress report on few-body hypernuclei

“…The 3 Λ H lifetime results shown in Table 1 hold generally for 3 Λ H wavefunctions corresponding to B Λ values about or near the central emulsion value. In most calculations the B Λ dependence of τ( 3 Λ H) is weak, the most striking manifestation of which is provided by the almost B Λ -independent lifetime calculated in / πEFT [17]. In contrast, the πEFT lifetime calculation [18] produces a strong B Λ dependence, as shown in Fig.…”

“…Recent measurements of τ( 3 Λ H) in relativistic heavy ion collision experiments renewed interest in the 3 Λ H lifetime problem. The first round of results from STAR [7] and ALICE [8] RD (1966) [13] closure-Λpn no -1.14 Congleton (1992) [14] closure-Λd no 0.33±0.02 1.15 Kamada (1998) [15] Faddeev-Λpn no 0.379 1.06 GG (2019) [16] closure-Faddeev-Λpn no 0.362 1.11±0.01 HH (2020) [17] / πEFT(LO)-Λd no 0.37±0.05 0.98±0.15 GG (2019) [16] closure-Faddeev-Λpn yes 0.357 1.23±0.02 POGFG (2020) [18] πEFT ) lifetime calculations assembled in Table 1. Its upper part lists works that disregard pion final-state interaction (πFSI).…”

Recent progress on few-body hypernuclei

“…The underlined R 3 value is the BC world-average experimental value [5]. [13] closure-Λpn no -1.14 Congleton (1992) [14] closure-Λd no 0.33±0.02 1.15 Kamada (1998) [15] Faddeev-Λpn no 0.379 1.06 GG (2019) [16] closure-Faddeev-Λpn no 0.362 1.11±0.01 HH (2020) [17] / πEFT(LO)-Λd no 0.37±0.05 0.98±0.15 GG (2019) [16] closure-Faddeev-Λpn yes 0.357 1.23±0.02 POGFG (2020) [18] πEFT…”

“…The closure approximation was used in Refs. [13,14,16], whereas the other two works [15,17] accounted microscopically for the outgoing nucleon phase space and FSI. The lifetimes τ( 3 Λ H)=1/Γ( 3 Λ H) derived from this upper part are shorter than τ Λ by less than 13%.…”