The NOvA Neutrino Experiment

07/02/2026

Fermilab has an article out on our new spokesperson, Linda Cremonesi!

Currently, NOvA is Fermilab’s leading long-baseline neutrino experiment. Cremonesi is now co-leading the international collaboration of scientists behind it.

06/30/2026

Today in PRD we have a publication describing the first ionization-based search for magnetic monopoles in NOvA using more than seven years of data collected with the Far Detector. See the publication here: https://journals.aps.org/prd/abstract/10.1103/spfn-hnhv

Magnetic monopoles are expected to produce exceptionally bright signals as they traverse the detector medium due to their large ionization energy loss. In addition, because of their extremely large mass, they are unlikely to stop inside the detector, resulting in long, straight, through-going tracks. To identify such rare signatures in the presence of nearly 150 kHz of cosmic-ray background, the Far Detector employs a data-driven monopole trigger that continuously searches for these characteristic event patterns within the cosmic flux.

No signal was observed in the analyzed dataset. With the detector’s large surface area and minimal overburden, we achieve the strongest limits reported to date in several regions of monopole speed and mass.

06/28/2026

That's a wrap on ! We had a blast in California, see you at the next Neutrino in two years!

06/26/2026

NOvA collaborators presented a huge number of posters at at University of California, Irvine this week. The posters cover a lot of our physics program - three-flavour oscillation analyses, searches for new physics, our work on exotic phenomena, neutrino interaction measurements, and our test beam.

📸: A lot of NOvA Collaborators!

06/23/2026

This morning, Zoya Vallari (Ohio State University) presented NOvA's latest results to a packed room at . We have new deep dives on our three-flavour oscillation results, new world-leading limits on sterile neutrinos, and by combining our results with those presented by JUNO yesterday, we prefer the normal ordering of neutrinos with a Bayes factor of 15.74 (Normal ordering is 16x more likely) or a significance of 1.88 sigma.

See the slides here: https://indico.global/event/15740/contributions/155585/

📸 Georgia Nissen, Adam Lister

06/16/2026

Interested to know what NOvA and JUNO might be able to say about the neutrino mass ordering when JUNO releases results? You can look into our crystal ball 🔮 at this website, https://nova-nusoft.fnal.gov/public/crystal_ball, with a longer write up in our preprint here: https://arxiv.org/abs/2606.14121

NOvA has been able to measure the magnitude of the atmospheric mass splitting to ~1.5%, but we don't yet know it's sign, meaning we do not know if the neutrino mass state with the most amount of electron neutrino is the heaviest or lightest neutrino. This "mass ordering" has wide-ranging ramifications for particle physics and cosmology.

One way that the mass ordering could be revealed is through comparisons of muon neutrino disappearance from long-baseline experiments such as NOvA with electron antineutrino disappearance from reactor experiments. In the correct ordering, these measurements should agree well, while in the incorrect ordering they would disagree. This new manusrcipt shows what the combination of NOvA's 10 year dataset and the anticipated high-precision JUNO measurement might tell us for many possible measured values and precisions.

06/15/2026

We have a new paper out in Physical Review D today!

Using high-statistics data from the NOvA Near Detector, this paper presents a detailed study of muon antineutrino charged-current neutral pion production on a hydrocarbon target at energies around 2 GeV. By measuring differential cross sections across multiple kinematic variables and comparing to leading neutrino interaction models, the analysis probes resonance production and final-state interactions inside the nucleus. The results provide new constraints on interaction modeling, with sensitivity to the Delta(1232) resonance region, and help reduce systematic uncertainties for current and future long-baseline neutrino oscillation experiments.

Read the publication in PRD here: https://journals.aps.org/prd/abstract/10.1103/t6vj-7hht

06/10/2026

Shout out to Jiangmen Underground Neutrino Observatory (JUNO) for a really interesting result out in today! Two NOvA collaborators, Tricia Vahle (College of William & Mary) and Zoya Vallari (Ohio State University), have a Nature "News and Views" write up of just why this is so cool.

"Understanding the behaviour of neutrinos is paramount to developing a complete description of matter and forces at the smallest scale. This first result from JUNO marks the dawn of the next era of precise neutrino oscillation measurements, and it promises fresh insights into the properties of these mysterious fundamental particles."

Read all about it here: https://www.nature.com/articles/d41586-026-01585-7.epdf?sharing_token=7_ueE4PtyBNOPtIEOY8qNdRgN0jAjWel9jnR3ZoTv0NL7cprO2ibx-pCqySq1Y1mYbg51lUZT3dHuSyeF1bn05LzyGkvMMvh93Zm6Fkyyqvi3f9tAcBEyecK0SSKWs0qZYN2TIASF0Fvh3EmkxRthk4Wfz8pQ3VOI-JDk-EsrI4%3D

We're excited to see updates from JUNO at , and of course, excited to show you what we on NOvA have been working on 👀

06/09/2026

NOvA was represented at CHEP 2026 in Bangkok, Thailand, where Gavin S. Davies () presented **"NOvA Software and Computing: Evolution, Lessons, and Impact; Supporting a Decade of Physics."**

The talk highlighted how NOvA's software and computing systems have evolved over more than a decade of data taking and analysis, supporting world-leading neutrino physics while adapting to new workflows, including machine-learning-based reconstruction.

Thanks to the CHEP organizers and to the many NOvA collaborators whose software, computing, operations, and analysis work make this physics possible.

04/07/2026

Please join us in congratulating Linda Cremonesi (Imperial College London, Assoc. Prof of Particle Physics) on becoming NOvA's new co-spokesperson. We're excited to welcome Linda into this leadership role and look forward to the insight, energy, and vision she will bring to the collaboration. Congratulations, Linda, and best wishes for the road ahead!