Probing beyond the standard model physics with double-beta decays

Bossio, Elisabetta; Agostini, Matteo

doi:10.1088/1361-6471/ad11f9

Cited by 5 publications

(2 citation statements)

References 180 publications

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“…It is essential to search for 0νββ in multiple isotopes not only for confirmation of discovery but also to identify the underlying mechanism of decay [65][66][67][68]. Experiments using different isotopes provide varying search sensitivity and background discrimination capabilities and are subject to independent systematic uncertainties.…”

Section: Neutrinoless Double-beta Decaymentioning

confidence: 99%

Experimental neutrino physics in a nuclear landscape

Parno,

Poon,

Singh

2024

Phil. Trans. R. Soc. A.

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There are profound connections between neutrino physics and nuclear experiments. Exceptionally precise measurements of single and double beta-decay spectra illuminate the scale and nature of neutrino mass and may finally answer the question of whether neutrinos are their own anti-matter counterparts. Neutrino–nucleus scattering underpins oscillation experiments and probes nuclear structure, neutrinos offer a rare vantage point into collapsing stars and nuclear fission reactors and techniques pioneered in neutrino nuclear physics experiments are advancing quantum sensing technologies. In this article, we review current and planned efforts at the intersection of neutrino and nuclear experiments. This article is part of the theme issue ‘The liminal position of Nuclear Physics: from hadrons to neutron stars’.

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Section: Neutrinoless Double-beta Decaymentioning

confidence: 99%

Experimental neutrino physics in a nuclear landscape

Parno,

Poon,

Singh

2024

Phil. Trans. R. Soc. A.

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“…While the latter remains experimentally elusive [11][12][13][14][15][16][17][18], the former serves as a playground to test different hypotheses and the predictive strengths of the nuclear structure models [19][20][21], and to constrain various parameters associated with physics beyond the SM [22][23][24][25][26][27][28][29][30][31][32]. A comprehensive and recent review on the latter topic can be found in [33]. DBD of proton-rich isotopes is also possible and is currently in the early stages of experimental exploration [34].…”

Section: Introductionmentioning

confidence: 99%

A Systematic Study of Two-Neutrino Double Electron Capture

Niţescu,

Ghinescu,

Stoica

et al. 2024

Universe

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In this paper, we update the phase-space factors for all two-neutrino double electron capture processes. The Dirac–Hartree–Fock–Slater self-consistent method is employed to describe the bound states of captured electrons, enabling a more realistic treatment of atomic screening and more precise binding energies of the captured electrons compared to previous investigations. Additionally, we consider all s-wave electrons available for capture, expanding beyond the K and L1 orbitals considered in prior studies. For light atoms, the increase associated with additional captures compensates for the decrease in decay rate caused by the more precise atomic screening. However, for medium and heavy atoms, an increase in the decay rate, up to 10% for the heaviest atoms, is observed due to the combination of these two effects. In the systematic analysis, we also include capture fractions for the first few dominant partial captures. Our precise model enables a close examination of low Q-value double electron capture in 152Gd, 164Er, and 242Cm, where partial KK captures are energetically forbidden. Finally, with the updated phase-space values, we recalculate the effective nuclear matrix elements and compare their spread with those associated with 2νβ−β− decay.

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Dual-phase xenon time projection chambers for rare-event searches

Baudis

2023

Phil. Trans. R. Soc. A.

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In the past decade, dual-phase xenon time projection chambers (Xe-TPCs) have emerged as some of the most powerful detectors in the fields of astroparticle physics and rare-event searches. Developed primarily towards the direct detection of dark matter particles, experiments presently operating deep underground have reached target masses at the multi-tonne scale, energy thresholds of approximately 1 keV and radioactivity-induced background rates similar to those from solar neutrinos. These unique properties, together with demonstrated stable operation over several years, allow for the exploration of new territory via high-sensitivity searches for a plethora of ultra-rare interactions. These include searches for particle dark matter, for second-order weak decays, and the observation of astrophysical neutrinos. We first review some properties of xenon as a radiation detection medium and the operation principles of dual-phase Xe-TPCs together with their energy calibration and resolution. We then discuss the status of currently running experiments and of proposed next-generation projects, describing some of the technological challenges. We end by looking at their sensitivity to dark matter candidates, to second-order weak decays and to solar and supernova neutrinos. Experiments based on dual-phase Xe-TPCs are difficult and, like all good experiments, they are constantly pushed to their limits. Together with many other endeavours in astroparticle physics and cosmology they will continue to push at the borders of the unknown, hopefully to reveal profound new knowledge about our cosmos. This article is part of the theme issue ‘The particle-gravity frontier’.

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Probing beyond the standard model physics with double-beta decays

Cited by 5 publications

References 180 publications

Experimental neutrino physics in a nuclear landscape

Experimental neutrino physics in a nuclear landscape

A Systematic Study of Two-Neutrino Double Electron Capture

Dual-phase xenon time projection chambers for rare-event searches

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