Extending the Reach of Leptophilic Boson Searches at DUNE and MiniBooNE with Bremsstrahlung and Resonant Production

Abstract

New gauge bosons coupling to leptons are simple and well-motivated extensions of the Standard Model. We study the sensitivity to gauged $L_{\hat{I}}¼-L_e$, $L_e-L_{\ddot{I}}„$ and $L_{\hat{I}}¼-L_{\ddot{I}}„$ both with the existing beam dump mode data of MiniBooNE and with the DUNE near detector. We find that including bremsstrahlung and resonant production of $Z^{\prime }$ which decays to $e^{\pm }$ and $\hat{I}{¼}^{\pm }$ final states leads to a significant improvement in existing bounds, especially for $L_{\hat{I}}¼-L_e$ and $L_e-L_{\ddot{I}}„$ for DUNE while competitive constraints can be achieved with the existing data from the MiniBooNE's beam dump run.

10 pages, 4 figures