Accelerator neutrinos as a probe of in-medium hyperon potentials

Abstract

Charged-current (anti)neutrino interactions create $\hat{I}›$ and $\hat{I}\pounds$ hyperons \emph{inside} the nucleus, making hyperon final-state interactions a terrestrial probe of the in-medium potentials that govern hyperon onset in neutron stars. In the StrangeMC simulation the trapped-$\hat{I}›$ fraction, escaping hyperon momenta, and a kaon-vetoed $\hat{I}{\pounds }^{+}$ tag respond monotonically to $U_{\hat{I}}›$ and $U_{\hat{I}}\pounds$ at SBND and DUNE. Marginalised over the low-density slope, a forecast gives $δU_Λ\approx6\MeV$ with systematics distinct from hypernuclear data; $U_{\hat{I}}\pounds$ is limited by hyperon--nucleon cross sections.

4 pages, 4 figures