Hypernuclear spectroscopy of products from Li-6 projectiles on a carbon target at 2 A GeV
Küçük Resim Yok
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A novel experiment, aiming at demonstrating the feasibility of hypernuclear spectroscopy with heavy ion beams, was conducted. Using the invariant mass method, the spectroscopy of hypernuclear products of Li-6 projectiles on a carbon target at 2 A GeV was performed. Signals of the Lambda-hyperon and H-3(Lambda) and H-4(Lambda) hypernuclei were observed for final states of p + pi(-), He-3 + pi(-) and He-4 + pi(-), respectively, with significance values of 6.7, 4.7 and 4.9 sigma. By analyzing the proper decay time from secondary vertex distribution with the unbinned maximum likelihood fitting method, their lifetime values were deduced to be 262(-43)(+56) +/- 45 ps for Lambda, 183(-32)(+42) +/- 37 ps for H-3(Lambda), and 140(-33)(+48) +/- 35 ps for H-4(Lambda). (c) 2013 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
NUCLEAR REACTIONS C(Li-6, X), (Li-6, t), (Li-6, H-4), E=2 GeV/nucleon, measured Lambda, H-3,H-4 Lambda-hypernuclei invariant mass distribution, T-1/2, deduced Lambda mass, H-3,H-4 Lambda-hypernuclei mass, T-1/2. Compared with other data, lifetime measurement
Kaynak
NUCLEAR PHYSICS A
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
913
