6533b85cfe1ef96bd12bbff0
RESEARCH PRODUCT
On the measured lifetime of light hypernuclei 3ΛH and 4ΛH
V. BozkurtV. BozkurtS. BianchinKazuki YoshidaKazuki YoshidaO. BertiniO. BertiniD. NakajimaD. NakajimaY. MaY. MaM. KavatsyukF. E. MaasF. E. MaasS. MinamiC. RappoldC. RappoldEun-hee KimEun-hee KimT.r. SaitoT.r. SaitoB. ÖZel-tashenovsubject
PhysicsNuclear physicsNuclear and High Energy PhysicsLifetime measurementPosterior probabilityHypernucleiBayesian approachCredible intervalddc:530LambdaHypertritonAveraged combinationdescription
A statistical combination of the experimental lifetime estimations available in the literatures is performed for 3 Λ H and 4 Λ H, including several recent measurements. The combined average values of the lifetime for 3 Λ H and 4 Λ H are respectively 216−16+19 ps and 192−18+20 ps with a reduced χ2 of 0.89 and 0.48. A new insight into the lifetime estimation of the HypHI Phase 0 experiment by a Bayesian approach is also presented. In this approach, several different prior distributions including the combination of previous lifetime data and a Jeffrey prior are used. The principal mode and the smallest credible interval at 68% of the posterior distribution, given by the prior belief of the previous measurements, are 217−16+19 ps and 194−18+20 ps respectively for 3 Λ H and 4 Λ H. The two employed approaches have revealed that the lifetime of hypernuclei 3 Λ H and 4 Λ H can be shorter than the Λ –hyperon lifetime.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-04-10 | Physics Letters B |