Experimental challenges and construction status of the NUMEN Project


Pierroutsakou D., Acosta L., Added N., Agodi C., Aguiar V., Amador-Valenzuela P., ...More

Nuovo Cimento della Societa Italiana di Fisica C, vol.49, no.4, 2026 (ESCI, Scopus)

Abstract

The NUMEN (NUclear Matrix Elements for Neutrinoless double beta decay) project at INFN-Laboratori Nazionali del Sud aims to investigate the Nuclear Matrix Elements that govern neutrinoless double beta decay. The strategy is based on measuring double charge exchange reactions with intense heavy-ion beams on candidate isotopes. To cope with the extremely low cross sections, the LNS facility has been upgraded to provide beams up to 1013 pps. A new target system and high-performance detectors for the MAGNEX spectrometer are under development, capable of sustaining ion rates of 5×106 Hz and allowing simultaneous γ-ray detection. This work provides a status update on the construction of the NUMEN apparatus, discussing recent progress and key experimental challenges.