Speaker
Description
Core-collapse supernovae are powerful cosmic laboratories to probe physics beyond the Standard Model. While exotic particles can alter explosion dynamics, previous studies relying on post-processing could not fully capture the non-linear feedback on multi-dimensional hydrodynamic features. In this talk, we report constraints on new physics obtained through two-dimensional neutrino-radiation hydrodynamic simulations.
First, we investigate eV-mass active-sterile neutrino oscillations ($\nu_e \leftrightarrow \nu_s$). Our simulations reveal that large mixing angles significantly reduce the electron-neutrino flux, suppressing neutrino-driven heating and preventing shock revival. Based on the observational fact that supernovae do explode, we establish a new constraint that excludes a substantial fraction of the parameter space favored by terrestrial experiments.
After that, we report results for dark photons (DPs). By performing simulations self-consistently coupled with DP production, we find that the DP cooling channel can lead to a failed explosion. Our results demonstrate that multi-dimensional hydrodynamic feedback is indispensable for evaluating astronomical signatures of novel particles in signals from supernova events.
| Category | Theory |
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