Journal
PHYSICAL REVIEW LETTERS
Volume 129, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.129.111803
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Funding
- DOE [DE-SC0010813]
- Department of Energy Office of Science, Los Alamos National Laboratory LDRD funding
- National Laboratories Office at Texas AM
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This study highlights the potential enhancement of beam-focused accelerator-based experiments' sensitivity to new physics signals through the production of new bosons by charged meson decays. Using the MiniBooNE low energy excess as a case study, the researchers attempt to explain the phenomenon and investigate the testability of two well-motivated dark-sector models.
We point out that 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. As proof of the principle, 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.
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