Radiative and exchange corrections for two-neutrino double-β decay
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00382387" target="_blank" >RIV/68407700:21670/25:00382387 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.111.035501" target="_blank" >https://doi.org/10.1103/PhysRevC.111.035501</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.111.035501" target="_blank" >10.1103/PhysRevC.111.035501</a>
Alternative languages
Result language
angličtina
Original language name
Radiative and exchange corrections for two-neutrino double-β decay
Original language description
We investigate the impact of radiative and atomic exchange corrections in the two-neutrino double-beta (2νββ) decay of Mo100. In the calculation of the exchange correction, the electron wave functions are obtained from a modified Dirac-Hartree-Fock-Slater self-consistent framework that ensures orthogonality between continuum and bound states. The atomic exchange correction causes a steep increase in the low-energy region of the single-electron spectrum, consistent with previous studies on β decay, while the radiative correction primarily accounts for a 5% increase in the decay rate of Mo100. When combined, the radiative and exchange effects cause a leftward shift of approximately 10 keV in the maximum of the summed electron spectrum. This shift may impact current constraints on parameters governing potential new physics scenarios in 2νββ decay. The exchange and radiative corrections are introduced on top of our previous description of 2νββ decay, where we used a Taylor expansion for the lepton energy parameters within the nuclear matrix elements denominators. This approach results in multiple components for each observable, controlled by the measurable ζ31 and ζ51 parameters. We explore the effects of different ζ31 and ζ51 values, including their experimental measurements, on the total corrected spectra. These refined theoretical predictions can serve as precise inputs for double-beta decay experiments investigating standard and new physics scenarios within 2νββ decay.
Czech name
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Czech description
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Classification
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
Result continuities
Project
<a href="/en/project/GA24-10180S" target="_blank" >GA24-10180S: Exploring the Properties of Neutrinos through Double Beta Decay: An Interplay between Theory and Experiment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW C
ISSN
2469-9985
e-ISSN
2469-9993
Volume of the periodical
111
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
"035501-1"-"035501-11"
UT code for WoS article
001459102600001
EID of the result in the Scopus database
2-s2.0-86000184720