A collaborative effort led by Indiana University combines NOvA and T2K data to advance understanding of how matter came to dominate the universe, using joint analyses of the two major neutrino experiments.

The project also highlights how high-energy physics technologies have broad impacts, training a new generation of scientists in data science, machine learning, and electronics.

Pooling datasets improves constraints on neutrino oscillation parameters, with particular attention to differences between neutrinos and antineutrinos that could signal CP violation.

NOvA routes neutrinos 810 kilometers from Fermilab to Ash River, Minnesota, while T2K sends neutrinos 295 kilometers to Super-Kamiokande in Japan; combining their data yields more precise measurements.

This work illustrates how future large-scale particle physics projects may succeed through shared analyses and broad international partnerships.

International collaboration, advances in detector technology and data analysis, and funding from the U.S. Department of Energy underpin the research, with participation from IU and colleagues across multiple countries.

Indiana University contributes through detector development, data interpretation, and student mentorship, with leaders such as Mark Messier guiding efforts since 2006.

Confirming CP violation in neutrinos could be a pivotal step toward explaining the matter-dominated universe and will spur further investigations in this domain.

By analyzing neutrino oscillations and potential neutrino–antineutrino differences, the study probes CP symmetry violations as a clue to why matter prevailed after the Big Bang.