Known and exotic light hypernuclei studied with the 6Li+12C reaction at 2 A GeV
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Institute of Physics Publishing
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Light hypernuclei have been studied by using induced reactions of 6Li projectiles bombarded on the natural carbon target by means of the invariant mass method, and 3 ?H and 4 ?H hypernuclei as well as ?-hyperons are produced and identified. Significance values of 3 ?H, 4 ?H and ? are respectively 4.7?, 4.9? and 6.7?. By analyzing decay vertices of 3 ?H, 4 ?H and ? by means of unbinned maximum likelihood fitting their lifetime values have been deduced to be 183+42 -32 ps, 140+48 -33 ps and 262+56 -43 ps, respectively. In addition, signals appeared for the d+?- and t+?- final states in the analyses on invariant mass and lifetime. Those signals have suggested a possible bound state of two neutrons with ?, 3 ?n. It has also been revealed for the first time that the lifetime of 3 ?H is significantly shorter than that of ?, which is consistent to the statistical analyses including all the lifetime data reported in the past. However, there is no theoretical model to explain the short lifetime of 3 ?H as well as the existence of the 3 ?n bound state. These should be further experimentally and theoretically studied. © Published under licence by IOP Publishing Ltd.
Açıklama
NUBA Conference Series 1: Nuclear Physics and Astrophysics -- 15 September 2014 through 21 September 2014 -- -- 111816
Anahtar Kelimeler
Kaynak
Journal of Physics: Conference Series
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
590
Sayı
1
