Full Data Release of the Daya Bay Reactor Neutrino Experiment
Daya Bay: all 5.55 M nGd IBD candidates (3158 days) plus every input needed for the θ13 / Δm²32 fit
The complete nGd inverse-beta-decay sample of Daya Bay (8 antineutrino detectors, 2011–2020, 3158 days) with daily livetimes and efficiencies, accidental-background rates and all inputs of the final oscillation analysis (Phys. Rev. Lett. 130, 161802). Two variants: the full dataset (event level, ~200 MB per format) and the analysis dataset (per-period IBD histograms and inputs, ~1 MB per format), each in HDF5, NPZ, ROOT and TSV.
Data card 10/11 sections
| Summary | The final Daya Bay nGd data set with everything needed to redo the published θ13 / Δm²32 measurement. Aimed at anyone fitting reactor oscillation data, including global fits. |
|---|---|
| Intended use | Reproduce or extend the PRL 130, 161802 oscillation fit; include Daya Bay in global fits; sterile-neutrino or BSM fits of the far/near ratio. |
| Out-of-scope use | Absolute reactor-flux or spectral-shape studies need the separate Daya Bay flux/spectrum releases; nH-capture sample not included. |
| Provenance | Official collaboration release (Zenodo, 2025) with identical mirrors at NHEPSDC; analysis inputs as used for PRL 130, 161802. |
| Composition | IBD candidates per AD with daily livetime/efficiency, accidental rates, background spectra and rates, reactor power and fission fractions, detector response (IAV, LSNL, resolution) and their uncertainties. |
| Systematics | Full nuisance model available through the official dayabay-model code (~180 nuisance parameters); a Δχ² table is part of the release. |
| Validation | Newtrinos reproduces the official model prediction to <1e-4 per bin (546 bins) and the official fit (sin²2θ13 0.08536 vs 0.08538, Δm²32 2.4748 vs 2.4746 ×10⁻³ eV²), see the verification entry 10.5281_zenodo.17587229. |
| Known limitations | The published Δχ² table is slightly wider at low values than both the official code and Newtrinos. Huber–Mueller spectral uncertainties are not included in the official default fit. |
| Maintenance | Versioned on Zenodo (v1.0.0); feedback via GitHub issues of dayabay-data-official. |
| Usage | pip install dayabay-model-official; examples in github.com/dagflow-team/dayabay-analysis. Newtrinos: |
| Preservation | DPHEP level 3 (analysis-level) |
| FAIR | Findable Accessible Interoperable Reusable |
Get it
| Location | Role | Host | Formats | Size |
|---|---|---|---|---|
| https://doi.org/10.5281/zenodo.17587229 full_dataset_* (~200 MB each) and analysis_dataset_* (~1.4 MB each) zip archives in four formats |
primary | Zenodo | HDF5, NumPy (npy/npz), ROOT, CSV / TSV | 782.9 MB, 8 files |
| NHEPSDC (China) | mirror | Institutional / collaboration web page | ||
| analysis dataset only | mirror | GitHub | ||
| analysis dataset only (PyPI) | mirror | Package registry |
Metadata
| Creators | Daya Bay Collaboration |
|---|---|
| Publisher | Zenodo |
| Maintainers | Zeyuan Yu · yuzy@ihep.ac.cn; Maxim Gonchar · gonchar@jinr.ru |
| Version | 1.0.0 |
| Published | 2025-11-15 |
| Licence | CC-BY-4.0 · terms |
| Access | Open |
| Experiments | Daya Bay |
| Collaborations | Daya Bay |
| Channels | Inverse beta decay (IBD) |
| Flavours | nuebar |
| Detector technology | Liquid scintillator |
| Energy range | 0.7–12 MeV (reconstructed prompt energy) |
| Data taking | 2011-12 – 2020-12 |
| Exposure | 3158 days, 8 ADs, 5.55 million nGd IBD candidates |
| Data levels | Event list, Binned observed data, Detector response, Systematics model, Likelihood / χ² map |
| Observables | reconstructed prompt energy, event time, detector |
| Binning | analysis dataset: 26 reconstructed-energy bins × 8 ADs × 3 periods |
| Events | 5550000 |
| Covariance / systematics / MC | yes / yes / no |
| Usage code | https://github.com/dagflow-team/dayabay-model-official |
| Result of | doi:10.1103/PhysRevLett.130.161802 |
Used by
- Newtrinos Newtrinos.jl — modules
daya_bay_3158days,reactor_flux,ibd_xsec; verified in 10.5281_zenodo.17587229, 10.1103_PhysRevLett.130.161802 - Software dayabay-model-official
- Software dayabay-analysis — official analysis examples and the full oscillation fit
Know of another paper or code that uses this, or an input it depends on? Tell us.
Papers
- doi:10.1103/PhysRevLett.130.161802 (describes)
- arXiv:2211.14988 (describes)
How to cite
- Daya Bay Collaboration, Full Data Release of the Daya Bay Reactor Neutrino Experiment, v1.0.0, Zenodo (2025), doi:10.5281/zenodo.17587229
- doi:10.1103/PhysRevLett.130.161802
Related
Curation
| Status | Verified (candidate: harvested, not reviewed · curated: reviewed metadata · verified: resource downloaded and checked against its paper) |
|---|---|
| Added | 2026-10-23 by Newtrinos team |
| Last reviewed | 2026-10-23 |