Complementarity of Neutrinoless Double Beta Decay and Cosmology

Journal Article · Thu Mar 20 04:00:00 EDT 2014

OSTI ID:1155860

Dodelson, Scott ^[1]; Lykken, Joseph ^[2]

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1. Enrico Fermi Institute, Univ. of Chicago, IL (United States)
2. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Neutrinoless double beta decay experiments constrain one combination of neutrino parameters, while cosmic surveys constrain another. This complementarity opens up an exciting range of possibilities. If neutrinos are Majorana particles, and the neutrino masses follow an inverted hierarchy, then the upcoming sets of both experiments will detect signals. The combined constraints will pin down not only the neutrino masses but also constrain one of the Majorana phases. If the hierarchy is normal, then a beta decay detection with the upcoming generation of experiments is unlikely, but cosmic surveys could constrain the sum of the masses to be relatively heavy, thereby producing a lower bound for the neutrinoless double beta decay rate, and therefore an argument for a next generation beta decay experiment. In this case as well, a combination of the phases will be constrained.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1155860
• Report Number(s): FERMILAB-PUB-14-065-A-T; arXiv eprint number arXiv:1403.5173
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS