Searching for New Physics in Two-Neutrino Double Beta Decay

Deppisch, Frank F.; Gráf, Lukáš; Šimkovic, F.

doi:10.1103/physrevlett.125.171801

Cited by 34 publications

(32 citation statements)

References 31 publications

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“…We refer to Bossio and Agostini (2022) for a comprehensive review of this topic. Future searches will have highsensitivity to additional physics, for instance exotic currents (Deppisch et al, 2020b), and light exotic fermions such as sterile neutrinos or Z 2 -odd fermions (Agostini et al, 2021c;Bolton et al, 2021).…”

Section: What Else Can Be Discovered By 0νββ-decay Experiments?mentioning

confidence: 99%

Toward the discovery of matter creation with neutrinoless double-beta decay

Agostini¹,

Benato²,

Detwiler³

et al. 2022

Preprint

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The discovery of neutrinoless double-beta decay could soon be within reach. This hypothetical ultra-rare nuclear decay is a portal to new physics beyond the Standard Model. Its observation would constitute the discovery of a matter-creating process, corroborating leading theories of why the universe contains more matter than antimatter, and how the forces unify at high energy scales. It would also prove that neutrinos and antineutrinos are not two distinct particles, but can transform into each other, generating their own mass in the process. The recognition that neutrinos are not massless necessitates an explanation and has boosted interest in neutrinoless double-beta decay. The field is now at a turning point. A new round of experiments is currently being prepared for the next decade to cover an important region of parameter space. Advancements in nuclear theory are laying the groundwork to connect the nuclear decay with the underlying new physics. Meanwhile, the particle theory landscape continues to find new motivations for neutrinos to be their own antiparticle. This review brings together the experimental, nuclear theory, and particle theory aspects connected to neutrinoless double-beta decay, to explore the path toward -and beyond -its discovery.

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Section: What Else Can Be Discovered By 0νββ-decay Experiments?mentioning

confidence: 99%

Toward the discovery of matter creation with neutrinoless double-beta decay

Agostini¹,

Benato²,

Detwiler³

et al. 2022

Preprint

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show abstract

“…In addition, precision measurements of 2νββ decay can also be used to probe new physics. For example, right-handed lepton currents affect the angular and energy distributions of the decay [706], MeV-scale sterile neutrinos can be searched for through kinks in the 2νββ spectrum [707,708], and neutrino self-interactions can leave an imprint on the spectrum as well [709]. Because lepton number is not necessarily violated in 2νββ decay, this is independent of the neutrino nature and can be used to constrain or pinpoint properties of both Majorana and Dirac neutrinos.…”

Section: Double Beta Processesmentioning

confidence: 99%

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

Aalbers,

Abe,

Aerne

et al. 2022

Preprint

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The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical

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“…With the increasing statistics of the 2νββ-decay, the possibility of exploring new physics beyond SM with this process becomes more and more reliable. The 2νββ-decay can be, and it is used for the search of the right-handed neutrino interactions without having to assume their nature [10], the neutrino self-interactions [11], the sterile neutrinos with masses up to Q-value of the process [12], the bosonic neutrino component [13], the violation of the Lorentz invariance [14][15][16][17], the 0νββ-decays with Majoron(s) emission [18,19] and the quadruple-β decay [20].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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The two-neutrino double-beta decay (2νββ-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 2νββ-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 gAeff can be determined more reliably by accurately measuring the angular correlation factor.

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Searching for New Physics in Two-Neutrino Double Beta Decay

Cited by 34 publications

References 31 publications

Toward the discovery of matter creation with neutrinoless double-beta decay

Toward the discovery of matter creation with neutrinoless double-beta decay

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

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

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