Dump-produced heavy neutral leptons contribute substantially to short-baseline neutrino detector signals and can be separated from dirt and detector production by energy, angle, and timing.
Accurate evaluation of hadronic uncertainties in spin-independent WIMP-nucleon scattering: Disentangling two- and three-flavor effects
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abstract
We show how to avoid unnecessary and uncontrolled assumptions usually made in the literature about soft SU(3) flavor symmetry breaking in determining the two-flavor nucleon matrix elements relevant for direct detection of WIMPs. Based on SU(2) Chiral Perturbation Theory, we provide expressions for the proton and neutron scalar couplings $f_u^{p,n}$ and $f_d^{p,n}$ with the pion-nucleon sigma-term as the only free parameter, which should be used in the analysis of direct detection experiments. This approach for the first time allows for an accurate assessment of hadronic uncertainties in spin-independent WIMP-nucleon scattering and for a reliable calculation of isospin-violating effects. We find that the traditional determinations of $f_u^p-f_u^n$ and $f_d^p-f_d^n$ are off by a factor of 2.
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Dirt/Detector/Dump: Complementary BSM production at Short-Baseline Neutrino Facilities
Dump-produced heavy neutral leptons contribute substantially to short-baseline neutrino detector signals and can be separated from dirt and detector production by energy, angle, and timing.