Zoya Vallari

Assistant Professor, Department of Physics,
Center of Cosmology & AstroParticle Physics (CCAPP),
Ohio State University.
Email: zoya@physics.osu.edu

I am an experimental particle physicist studying small fundamental particles called neutrinos. Neutrinos come in three flavors and oscillate from one kind to another depending on their energy and the distance traveled. The detection of neutrino oscillations provided conclusive evidence that neutrinos are massive. This remains the first and only experimental confirmation of physics beyond the Standard Model.

Today, neutrinos continue to provide a rich environment to explore fundamental physics. I work on the flagship US experiments studying long-baseline neutrino oscillations, NOvA, and DUNE. Precise measurement of the oscillation parameters gives us insight into the fundamental physics theories which govern how particles interact with each other.

research interest

  • Analyzing neutrino flavor transformations to determine the mass ordering of neutrinos, test the completeness of the three-flavor paradigm to describe neutrino properties, and to search for charge-parity violation in leptons
  • Advancing the understanding of neutrino-nucleus interactions
  • Designing & building the next-generation neutrino detector
  • Development & adaptation of high-performance computing in high-energy particle physics

recent highlights

Jun 2026 Our paper “Determining Neutrino Mass Ordering with NOvA and Upcoming JUNO Measurements” is now on arXiv. Explore what future NOvA and JUNO measurements will say about the mass ordering with this interactive tool.
Jun 2026 Had a wonderful time presenting the NOvA talk at the Neutrino 2026 conference in Irvine, and teaching students about long-baseline neutrino experiment physics at the International Neutrino Summer School at UC Santa Barbara.
May 2026 Together with my colleague Tricia Vahle, I wrote a Nature News & Views article putting JUNO’s first measurement into perspective. I was also interviewed for Science Magazine about the result.
Oct 2025 Our joint analysis, “NOvA-T2K’s first results,” was published in Nature. Read more from Reuters and Ohio State News.