← Results

Cosmological Parameter Estimation

The headline results. CPE takes the distance and growth measurements from every tracer and method, combines them with the CMB and supernovae, and asks what they imply for dark energy, the neutrino masses and extensions to ΛCDM.

These papers draw on BAO and full-shape measurements from galaxies, quasars and the Lyman-α forest together, which is why they sit here rather than under any one measurement.

Dark energy

DESI's most-discussed result: the data prefer a dark energy equation of state that evolves with time over a cosmological constant, at a significance that has grown with each data release.

Neutrino mass

Massive neutrinos suppress the growth of structure on small scales, so a survey that measures growth constrains the sum of their masses — with results that depend sensitively on the cosmological model assumed.

Tensions and systematics

Ahead

The next round of parameter estimation will use BAO and full shape from both galaxies and the Lyman-α forest over the complete five-year survey, expected from early 2027.