July 30, 2022 to August 6, 2022
Cliff Lodge
US/Mountain timezone

Charged-meson-induced new physics in beam-focused neutrino experiments

Aug 4, 2022, 11:20 AM
Magpie B

Magpie B

Talk WG5: Beyond PMNS WG5: Beyond PMNS


Doojin Kim (Texas A&M University)


We point out that the production of new bosons by charged meson decays can greatly enhance the sensitivity of beam-focused accelerator-based experiments to new physics signals. This enhancement arises since the charged mesons are focused and their three-body decays do not suffer from helicity suppression in the same way as their usual two-body decays. As a realistic application, we attempt to explain the MiniBooNE low energy excess utilizing this overlooked mechanism, uniquely realizing dark-sector interpretations as plausible solutions to the excess. For illustration purposes, we consider two well-motivated classes of dark-sector models, models of vector-portal dark matter and models of long-lived (pseudo)scalar. We argue that the model parameter values to accommodate the excess are consistent with existing limits and that they can be tested at current and future accelerator-based neutrino experiments.

Attendance type In-person presentation

Primary author

Doojin Kim (Texas A&M University)


Bhaskar Dutta (Texas A&M University) Richard Van de Water (LANL) Adrian Thompson (Texas A&M University) Remington Thornton

Presentation materials