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HNLs at DUNE, DarkQuest, and the SBN Program

DOI

Code written for the production of $Z^\prime$ and Heavy Neutral Leptons (HNL) for https://arxiv.org/abs/2410.08981, "Enhancing the Sensitivity to Seesaw Predictions in Gauged $B−L$ Scenarios", Francesco Capozzi, Bhaskar Dutta, Gajendra Gurung, Wooyoung Jang, Ian M. Shoemaker, Adrian Thompson, and Jaehoon Yu

Contact: Adrian Thompson a.thompson@northwestern.edu

Requirements:

Files include

  • HNL branching ratios: hnl_decays.py
  • Zprime branching ratios: zprime_decay_widths.py
  • Flux simulation: hnl_flux.py

Fluxes generated with GEANT4, tabulated as 4-vectors (in GeV)

  • Pi0 meson 4-momenta generated in the DUNE target geometry with GEANT4: data/dune_target_pi0_4vectors_1e5POT.txt
  • Eta0 meson 4-momenta generated in the DUNE target geometry with GEANT4: data/dune_target_eta0_4vectors_1e5POT.txt

Constants

  • darkquest_constants.py
  • dune_constants.py

Data

  • R ratio: data/r_ratio_by_sqrts-GeV.txt

We also acknowledge and use constraints on the HNL parameter space from https://www.hep.ucl.ac.uk/~pbolton/index.html