Aiming to better understand the nature of the neutrino and the origins of matter in the universe

Neutrinos—tiny, nearly massless particles with no charge—are difficult to detect and measure, but they may hold the answers to unanswered cosmic questions. To understand more about the neutrino, our scientists and engineers are searching for an extremely rare (and still hypothesized) version of double beta decay with the nEXO experiment.

Our collaboration combines expertise from all over the world to develop detector technology that will allow nEXO to achieve unprecedented sensitivity to neutrinoless double beta decays.

The nEXO experiment is under development. We invite you to explore this site to learn more about our latest work.

In the news

nEXO collaborators take lead roles in Snowmass

April 15, 2021- 
The Snowmass High Energy Physics Community Planning process is underway, and three nEXO collaborators are taking leading roles in the process. John Orrell is co-convening the Underground Facilities Frontier, Andrea Pocar is co-convening the Rare Processes and Precision Measurements topical group RF04 for Baryon and Lepton Number Violating Processes, and Lisa Kaufman is co-convening the...

New publication: Simulation of charge readout with segmented tiles in nEXO

April 15, 2021- 
The nEXO time projection chamber (TPC) will be equipped with charge collection tiles to form the anode. In a recently published paper, the charge reconstruction performance of this anode design was studied with a dedicated simulation package. A multi-variate method and a deep neural network were developed to distinguish simulated neutrinoless double beta decay (0νββ) signals from backgrounds...