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arXiv · 2607.15392

Solar-System Abundances of $p$-Nuclides Probe Collective Neutrino Oscillations in Supernovae

Alexander Friedland·Derek J. Li·Giuseppe Lucente·Payel Mukhopadhyay·Ian Padilla-Gay·Amol V. Patwardhan
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Abstract

Direct evidence for collective neutrino oscillations in core-collapse supernovae remains elusive. We show that this quantum phenomenon leaves a footprint on the abundance pattern of proton-rich nuclides in the solar system. Modeling the $\nu p$-process using a $20\,M_\odot$ progenitor, we map out the dependence of the total yields on the starting radius of the oscillations, self-consistently coupling hydrodynamics and nucleosynthesis. The oscillations boost key $p$-nuclides ($^{92,94}\text{Mo}$, $^{96,98}\text{Ru}$) and long-lived $^{92}\text{Nb}$ by up to two orders of magnitude, bringing their abundances into agreement with the observations. The best match is found when oscillations commence within $10\text{ km}$ of the proto-neutron star surface, indicating fast collective oscillations.

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Alexander Friedland, Derek J. Li, Giuseppe Lucente, Payel Mukhopadhyay, Ian Padilla-Gay, Amol V. Patwardhan. 2026-07-16. Solar-System Abundances of $p$-Nuclides Probe Collective Neutrino Oscillations in Supernovae. https://arxiv.org/abs/2607.15392

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