Marco Stein Muzio

Research

Cartoon of secondary particles being produced as an UHECR propagates from its source to Earth.

What are the sources of the highest energy particles ever observed? How does Nature accelerate particles to such extraordinary energies? What astrophysical environments achieve the right conditions to produce them? And how can we use these particles to learn about particle physics beyond the Standard Model and out of the reach of terrestrial accelerators?

These are some of the questions my research seeks to answer. Combining unprecedented observations of ultrahigh energy cosmic rays, astrophysical neutrinos, and gamma-rays I work to better understand the types of environments which could produce extreme cosmic messengers. Additionally, to broaden the portfolio of messengers at ultrahigh energies, I am working to observe the first ultrahigh energy neutrino using the in-ice radio detection technique.

I aim to deepen the connections between cosmic messengers to broaden the impact of existing astroparticle facilities. My work has revealed new observational opportunities and laid the foundation for higher sensitivity ultrahigh energy neutrino searches in the future. Finally, I am involved in the development of the next-generation of ultrahigh energy cosmic ray observatories, in particular with the Global Cosmic Ray Observatory (GCOS).