  Neutrino production of radio Cherenkov signals in the Moon is the object of
radio telescope observations. Depending on the energy range and detection
parameters, the dominant contribution to the neutrino signal may come from
interactions of the neutrino on the Moon facing the telescope, rather than
neutrinos that have traversed a portion of the Moon. Using the approximate
analytic expression of the effective lunar aperture from a recent paper by
Gayley, Mutel and Jaeger, we evaluate the background from cosmic ray
interactions in the lunar regolith. We also consider the modifications to the
effective lunar aperture from generic non-standard model neutrino interactions.
A background to neutrino signals are radio Cherenkov signals from cosmic ray
interactions. For cosmogenic neutrino fluxes, neutrino signals will be
difficult to observe because of low neutrino flux at the high energy end and
large cosmic ray background in the lower energy range considered here. We show
that lunar radio detection of neutrino interactions is best suited to constrain
or measure neutrinos from astrophysical sources and probe non-standard
neutrino-nucleon interactions such as microscopic black hole production.
