  In 2018, the E12-17-003 experiment was conducted at the Thomas Jefferson
National Accelerator Facility (JLab) to explore the possible existence of an
nnLambda state in the reconstructed missing mass distribution from a tritium
gas target [K. N. Suzuki et al., Prog. Theor. Exp. Phys. 2022, 013D01 (2022),
B. Pandey et al., Phys. Rev. C 105, L051001 (2022)]. As part of this
investigation, data was also collected using a gaseous hydrogen target, not
only for a precise absolute mass scale calibration but also for the study of
Lambda/Sigma^0 electroproduction. This dataset was acquired at Q^2~0.5
(GeV/c)^2, W=2.14 GeV, and theta_{gamma K}^{c.m.}~8 deg. It covers forward
angles where photoproduction data is scarce and a low-Q^2 region that is of
interest for hypernuclear experiments. On the other hand, this kinematic region
is at a slightly higher Q^2 than previous hypernuclear experiments, thus
providing crucial information for understanding the Q^2 dependence of the
differential cross sections for Lambda/Sigma^0 hyperon electroproduction. This
paper reports on the Q^2 dependence of the differential cross section for the e
+ p -> e' + K^+ + Lambda/Sigma^0 reaction in the 0.2-0.8 (GeV/c)^2, and
provides comparisons with the currently available theoretical models.
