Beta-spectrum shapes of forbidden β decays
Kostensalo, J., & Suhonen, J. (2018). Beta-spectrum shapes of forbidden β decays. International Journal of Modern Physics A, 33(9), Article 1843008. https://doi.org/10.1142/S0217751X1843008X
Julkaistu sarjassa
International Journal of Modern Physics APäivämäärä
2018Tekijänoikeudet
© World Scientific Publishing Company, 2018.
The neutrinoless ββ decay of atomic nuclei continues to attract fervent interest due to
its potential to confirm the possible Majorana nature of the neutrino, and thus the nonconservation of the lepton number. At the same time the direct dark-matter experiments
are looking for WIMPs (weakly interacting massive particles) through their scattering on
nuclei. The neutrino-oscillation experiments on reactor antineutrinos base their analyses
on speculations of β-spectrum shapes of nuclear decays, thus leading to the notorious
“reactor antineutrino anomaly”. In all these experimental efforts one encounters the
problem of β-spectrum shapes of forbidden β decays, either as unwanted backgrounds
or unknown components in the analyses of data. In this work the problem of spectrum
shapes is discussed and illustrated with a set of selected examples. The relation of the
β-spectrum shapes to the problem of the effective value of the weak axial-vector coupling
strength gA and the enhancement of the axial-charge matrix element is also pointed out.
...
Julkaisija
World Scientific Publishing Co. Pte. Ltd.ISSN Hae Julkaisufoorumista
0217-751XAsiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/27978634
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