Angular Distributions of Emitted Electrons in the Two-Neutrino beta beta Decay

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F21%3A00355005" target="_blank" >RIV/68407700:21670/21:00355005 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/universe7050147" target="_blank" >https://doi.org/10.3390/universe7050147</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/universe7050147" target="_blank" >10.3390/universe7050147</a>

Result language
angličtina
Original language name
Angular Distributions of Emitted Electrons in the Two-Neutrino beta beta Decay
Original language description
The two-neutrino double-beta decay (2 nu beta beta-decay) process is attracting more and more attention of the physics community due to its potential to explain nuclear structure aspects of involved atomic nuclei and to constrain new (beyond the Standard model) physics scenarios. Topics of interest are energy and angular distributions of the emitted electrons, which might allow the deduction of valuable information about fundamental properties and interactions of neutrinos once a new generation of the double-beta decay experiments will be realized. These tasks require an improved theoretical description of the 2 nu beta beta-decay differential decay rates, which is presented. The dependence of the denominators in nuclear matrix elements on lepton energies is taken into account via the Taylor expansion. Both the Fermi and Gamow-Teller matrix elements are considered. For nuclei of experimental interest, relevant phase-space factors are calculated by using exact Dirac wave functions with finite nuclear size and electron screening. The uncertainty of the angular correlation factor on nuclear structure parameters is discussed. It is emphasized that the effective axial-vector coupling constant g(A)(eff) can be determined more reliably by accurately measuring the angular correlation factor.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics

Project
<a href="/en/project/EF16_019%2F0000766" target="_blank" >EF16_019/0000766: Engineering applications of microworld physics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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