Neutrinoless double electron capture

Abstract

Direct determination of the neutrino mass is at the present time one of the most important aims of experimental and theoretical research in nuclear and particle physics. A possible way of detection is through neutrinoless double electron capture, $0\nu ECEC$. This process can only occur when the energy of the initial state matches precisely that of the final state. We present here a calculation of prefactors (PF) and nuclear matrix elements (NME) within the framework of the microscopic interacting boson model (IBM-2) for ${}^{124}$Xe, ${}^{152}$Gd, ${}^{156}$Dy, ${}^{164}$Er, and ${}^{180}$W. From PF and NME we calculate the expected half-lives and obtain results that are of the same order as those of $0\nu {\beta }^{+}{\beta }^{+}$ decay, but considerably longer than those of $0\nu {\beta }^{-}{\beta }^{-}$ decay.

References in corpus (6)

• Phase space factors for double-$\beta$ decay
• Nuclear matrix elements for double-β decay
• Limits on the neutrino mass from neutrinoless double-$\beta$ decay
• Phase space factors for ${\beta }^{+}{\beta }^{+}$ decay and competing modes of double-$\beta$ decay
• Neutrinoless double positron decay and positron emitting electron capture in the interacting boson model
• Q value and half-life of double-electron capture in Os-184

Cited by in corpus (21)

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• Neutrinoless Double-Electron Capture
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• Phase space factors and half-life predictions for Majoron emitting ${\beta }^{-}{\beta }^{-}$ decay
• Improved search for two-neutrino double electron capture on ${}^{124}$Xe and ${}^{126}$Xe using particle identification in XMASS-I
• Search for Two-Neutrino Double Electron Capture of ${}^{124}$Xe with XENON100
• Search for Neutrinoless ${\beta }^{+}EC$ Decay of ${}^{120}$Te with CUORE-0
• Radiopure tungstate and molybdate crystal scintillators for double beta decay experiments
• Search for two-neutrino double electron capture on ${}^{124}$Xe with the XMASS-I detector
• Detection prospects for the second-order weak decays of ${}^{124}$Xe in multi-tonne xenon time projection chambers
• Double Beta Decay to the Excited States: Review
• Double Beta Decay APPEC Committee Report
• New Limits on Double Electron Capture of ${}^{40}$Ca and ${}^{180}$W
• New limits on $2\epsilon$, $\epsilon {\beta }^{+}$ and $2{\beta }^{+}$ decay of ${}^{136}$Ce and ${}^{138}$Ce with deeply purified cerium sample
• A search for the radiative neutrinoless double electron capture of ${}^{58}$Ni
• Evaluation of radon adsorption efficiency values in xenon with activated carbon fibers
• Improved limits on ${\beta }^{+}$EC and ECEC processes in ${}^{74}$Se
• Stimulated transitions in resonant atom Majorana mixing
• Double electron capture searches in ${}^{74}$Se