6533b834fe1ef96bd129d4e9

RESEARCH PRODUCT

Spectroscopy of the neutron-rich hypernucleusHeΛ7from electron scattering

Pavlo BaturinD. KawamaS. N. NakamuraTomislav PetkovićS. A. WoodM. VeilleuxW. LuoV. TadevosyanC. NevilleT. O. YamamotoB. S. HuR. A. BaduiAshot GasparianM. Y. GabrielyanE. J. BrashM. KawaiT. HornL. YaMichael KohlJ. PochodzallaA. ShichijoB. SawatzkyMasashi KanetaF. GaribaldiW. U. BoeglinNuruzzamanPatrick AchenbachE. ChristyI. AlbayrakL. ZhuW. F. VulcanKazushige MaedaRolf EntM. FujitaY. HanJ. BonoChhanda SamantaHiroki KandaY. OkayasuK. YokotaL. G. TangO. AtesZ. YeS. DanagoulianA. ChibaV. MaxwellA. NunezEd V. HungerfordMiroslav FurićG. NiculescuM. ElaasarTomofumi MarutaOsamu HashimotoA. MkrtchyanChunhui ChenN. TaniyaSeigo KatoA. LiyanageKyo TsukadaH. KhanalA. AsaturyanF. R. WesselmannR. AsaturyanPete MarkowitzL. YuanL. GanR. De LeoD. DoiH. MkrtchyanA. AhmidouchT. SevaY. FujiiAmur MargaryanDarko AndroićA. MatsumuraToshiyuki GogamiToshiyuki GogamiS. ZhamkochyanJ. ReinholdSho NagaoX. QiuM. K. JonesM. I. NiculescuV. M. RodriguezP. CarterAmrendra NarayanD. Gaskell

subject

Physics010308 nuclear & particles physicsNeutron emissionBinding energyHypernucleus01 natural sciencesNuclear physics0103 physical sciencesNeutronSymmetry breakingAtomic physics010306 general physicsWave functionSpectroscopyElectron scattering

description

The missing mass spectroscopy of the HeΛ7 hypernucleus was performed using the Li7(e, e ′K+)HeΛ7 reaction at the Thomas Jefferson National Accelerator Facility Hall C. The Λ- binding energy of the ground-state (1/2+) was determined with a smaller error than that of the previous measurement, being BΛ=5.55±0.10stat.±0.11sys.MeV. The experiment also provided new insight into charge symmetry breaking in p-shell hypernuclear systems. Finally, a peak at BΛ=3.65±0.20stat. ±0.11sys.MeV was observed and assigned as a mixture of 3/2+ and 5/2+ states, confirming the "gluelike" behavior of Λ, which makes an unstable state in He6 stable against neutron emission.

https://doi.org/10.1103/physrevc.94.021302