Angular Distributions for $_{\ensuremath{\Lambda}}^{3,4}\mathrm{H}$ Bound States in the $^{3,4}\mathrm{H}\mathrm{e}(e,{e}^{\ensuremath{'}}{K}^{+})$ Reaction

Angular Distributions for ${}_{Λ}^{3, 4}H$ Bound States in the ${}^{3, 4}{H e} (e, e^{'} K^{+})$ Reaction

F. Dohrmann et al.

Phys. Rev. Lett. 93, 242501 – Published 9 December 2004

Abstract

The ${}_{Λ}^{3, 4}H$ and ${}_{Λ}^{4}H$ hypernuclear bound states have been observed for the first time in kaon electroproduction on ${}^{3, 4}{H e}$ targets. The production cross sections have been determined at $Q^{2} = 0.35 {G e V}^{2}$ and $W = 1.91 G e V$ . For either hypernucleus the nuclear form factor is determined by comparing the angular distribution of the ${}^{3, 4}{H e} (e, e^{'} K^{+}) {}_{Λ}^{3, 4}H$ processes to the elementary cross section ${}^{1}H (e, é K^{+}) Λ$ on the free proton, measured during the same experiment.