Recent advances in neutrinoless double beta decay search
نویسنده
چکیده
Even after the discovery of neutrino flavour oscillations, based on data from atmospheric, solar, reactor, and accelerator experiments, many characteristics of the neutrino remain unknown. Only the neutrino square-mass differences and the mixing angle values have been estimated, while the value of each mass eigenstate still hasn’t. Its nature (massive Majorana or Dirac particle) is still escaping. Neutrinoless double beta decay (0ν-DBD) experimental discovery could be the ultimate answer to some delicate questions of elementary particle and nuclear physics. The Majorana description of neutrinos allows the 0ν-DBD process, and consequently either a mass value could be measured or the existence of physics beyond the standard should be confirmed without any doubt. As expected, the 0ν-DBD measurement is a very difficult field of application for experimentalists. In this paper, after a short summary of the latest results in neutrino physics, the experimental status, the R&D projects, and perspectives in 0ν-DBD sector are reviewed.
منابع مشابه
One Year of Evidence for Neutrinoless Double Beta Decay
The present experimental status in the search for neutrinoless double beta decay is reviewed, with emphasis on the first indication for neutrinoless double beta decay found in the HEIDELBERG-MOSCOW experiment, giving first evidence for lepton number violation and a Majorana nature of the neutrinos. Future perspectives of the field are briefly outlined.
متن کاملNeutrinoless Double Beta Decay and New Physics in the Neutrino Sector
Neutrinoless double beta decay belongs to the most sensitive tools for the search of new physics beyond the standard model. The recent half life limit of the Heidelberg–Moscow experiment implies restrictive bounds on the absolute mass scale in the neutrino sector. Possible improvements by the GENIUS project provide a unique possibility to reconstruct the neutrino mass spectrum. Further constrai...
متن کاملLight yield measurements of scintillator cocktails for use in detectors of neutrinoless double beta decay
The ongoing search for neutrinoless double beta decay is one of the most active fields in particle physics today. Neutrinoless double beta decay, if observed, will provide insight into physics beyond the standard model. Improving scintillator composition in order to optimize light yield and eliminate background is one way to increase detector sensitivity. This paper presents studies on the ligh...
متن کاملConsequences of neutrinoless double beta decay and WMAP
Observation of the neutrinoless double beta decay (0νββ) has established that there is lepton number violation in nature and the neutrino masses are Majorana in nature. It also gives the absolute mass of the neutrinos and discriminates between different models of neutrino masses. The allowed amount of lepton number violation puts severe constraints on some possible new physics beyond the standa...
متن کاملDouble beta Decay: Experiments and Theory Review
With neutrino oscillations now firmly established, neutrinoless double beta decay assumes great importance since it is one of the most powerful tools to set the neutrino mass absolute scale and establish whether the neutrino is a Majorana particle. After a summary of the neutrinoless double beta decay phenomenology, the present status of the experimental search for this rare decay is reported a...
متن کاملWhat can we learn from neutrinoless double beta decay experiments?
We assess how well next-generation neutrinoless double beta decay and normal neutrino beta decay experiments can answer four fundamental questions. ~1! If neutrinoless double beta decay searches do not detect a signal, and if the spectrum is known to be inverted hierarchy, can we conclude that neutrinos are Dirac particles? ~2! If neutrinoless double beta decay searches are negative and a next-...
متن کامل