The Physics of Neutrinoless Double Beta Decay: A Primer

Jones, Ben

doi:10.48550/arxiv.2108.09364

Cited by 5 publications

(5 citation statements)

References 33 publications

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“…This constraint is relaxed to i m ν i 1 eV if neutrinos are allowed to decay [48]. An additional constraint on the mass of Majorana neutrinos comes from experiments searching for neutrinoless double beta decay (0νββ), for which the rate is proportional to the magnitude of effective Majorana mass, m ββ = i U 2 ei m ν i [49]. The strongest bound on the neutrino mass using 0νββ is set by KamLAND-Zen, |m ββ | ≤ 0.17 eV [50].…”

Section: Other Constraintsmentioning

confidence: 99%

Limits on the cosmic neutrino background

Bauer

Shergold

2023

J. Cosmol. Astropart. Phys.

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We present the first comprehensive discussion of constraints on the cosmic neutrino background (CνB) overdensity, including theoretical, experimental and cosmological limits for a wide range of neutrino masses and temperatures. Additionally, we calculate the sensitivities of future direct and indirect relic neutrino detection experiments and compare the results with the existing constraints, extending several previous analyses by taking into account that the CνB reference frame may not be aligned with that of the Earth. The Pauli exclusion principle strongly disfavours overdensities ην ≫ 1 at small neutrino masses, but allows for overdensities ην ≲ 125 at the KATRIN mass bound mν ≃ 0.8 eV. On the other hand, cosmology strongly favours 0.2 ≲ ην ≲ 3.5 in all scenarios. We find that direct detection proposals are capable of observing the CνB without a significant overdensity for neutrino masses mν ≳ 50 meV, but require an overdensity ην ≳ 3 × 105 outside of this range. We also demonstrate that relic neutrino detection proposals are sensitive to the helicity composition of the CνB, whilst some may be able to distinguish between Dirac and Majorana neutrinos.

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Section: Other Constraintsmentioning

confidence: 99%

Limits on the cosmic neutrino background

Bauer

Shergold

2023

J. Cosmol. Astropart. Phys.

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“…Neutrinoless double-beta decay (0νββ for short) is the prime lepton number violating process [22][23][24] that is sensitive not only to the absolute scale of neutrino mass but also to the Majorana phases inaccessible to oscillation experiments.…”

Section: Neutrino Oscillationsmentioning

confidence: 99%

Towards deconstructing the simplest seesaw mechanism

Mandal,

Miranda,

Garcia

et al. 2022

Preprint

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The triplet or type-II seesaw mechanism is the simplest way to endow neutrinos with mass in the Standard Model (SM). Here we review its associated theory and phenomenology, including restrictions from S, T , U parameters, neutrino experiments, charged lepton flavour violation as well as collider searches. We also examine restrictions coming from requiring consistency of electroweak symmetry breaking, i.e. perturbative unitarity and stability of the vacuum. Finally, we discuss novel effects associated to the scalar mediator of neutrino mass generation namely, (i) rare processes, e.g. lα → l β γ decays, at the intensity frontier, and also (ii) four-lepton signatures in colliders at the highenergy frontier. These can be used to probe neutrino properties in an important way, providing a test of the absolute neutrino mass and mass-ordering, as well as of the atmospheric octant. They may also provide the first evidence for charged lepton flavour violation in nature. In contrast, neutrino non-standard interaction strengths are found to lie below current detectability.

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“…This constraint is relaxed to ř i m ν i À 1 eV if neutrinos are allowed to decay [48]. An additional constraint on the mass of Majorana neutrinos comes from experiments searching for neutrinoless double beta decay (0νββ), for which the rate is proportional to the magnitude of effective Majorana mass, m ββ " ř i U 2 ei m ν i [49]. The strongest bound on the neutrino mass using 0νββ is set by KamLAND-Zen, |m ββ | ď 0.17 eV [50].…”

Section: Other Constraintsmentioning

confidence: 99%

Limits on the cosmic neutrino background

Bauer¹,

Shergold²

2022

Preprint

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We present the first comprehensive discussion of constraints on the cosmic neutrino background (CνB) overdensity, including theoretical, experimental and cosmological limits for a wide range of neutrino masses and temperatures. Additionally, we calculate the sensitivities of future direct and indirect relic neutrino detection experiments and compare the results with the existing constraints, extending several previous analyses by taking into account that the CνB reference frame may not be aligned with that of the Earth. The Pauli exclusion principle strongly disfavours overdensities η ν " 1 at small neutrino masses, but allows for overdensities η ν À 125 at the KATRIN mass bound m ν » 0.8 eV. On the other hand, cosmology strongly favours η ν À 3.5 in all scenarios. We find that direct detection proposals are capable of observing the CνB without a significant overdensity for neutrino masses m ν ą 0.2 eV, but require an overdensity η ν Á 10 7 outside of this range. We also demonstrate that relic neutrino detection proposals are sensitive to the helicity composition of the CνB, whilst some may be able to distinguish between Dirac and Majorana neutrinos.

show abstract

The Physics of Neutrinoless Double Beta Decay: A Primer

Cited by 5 publications

References 33 publications

Limits on the cosmic neutrino background

Limits on the cosmic neutrino background

Towards deconstructing the simplest seesaw mechanism

Limits on the cosmic neutrino background

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