Double Beta Decay, Majorana Neutrinos, and Neutrino Mass

Avignone, Frank T.; Elliott, Steven R.; Engel, Jonathan

doi:10.48550/arxiv.0708.1033

Cited by 74 publications

(117 citation statements)

References 123 publications

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“…in a variety of experiments using different (Z, A) nuclei [3]. The process can be mediated by light Majorana neutrinos, as well as by alternative (and possibly co-existing) mechanisms invoking new particles and interactions beyond the Standard Model [4].…”

Section: Introductionmentioning

confidence: 99%

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Multi-isotope degeneracy of neutrinoless double-βdecay mechanisms in the quasiparticle random-phase approximation

et al. 2011

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We calculate nuclear matrix elements (NME) of neutrinoless double beta decay (0νββ) in four different candidate nuclei ( 76 Ge, 82 Se, 100 Mo, 130 Te) within the quasiparticle random phase approximation (QRPA) and its uncertainties. We assume (up to) four coexisting mechanisms for 0ν2β decay, mediated by light Majorana neutrino exchange (ν), heavy Majorana neutrino exchange (N ), R-parity breaking supersymmetry ( / R), and squark-neutrino (q), interfering either constructively or destructively with each other. We find that, unfortunately, current NME uncertainties appear to prevent a robust determination of the relative contribution of each mechanism to the decay amplitude, even assuming accurate measurements of decay lifetimes. The near-degeneracy of 0νββ mechanisms is analyzed with simple algebraic techniques, which do not involve assumptions about the statistical distribution of errors. We discuss implications of such degeneracy on prospective searches for absolute neutrino masses.

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Section: Introductionmentioning

confidence: 99%

“…As a consequence, our analysis is restricted to a relatively small set of candidate nuclei and mechanisms. We consider four among the experimentally promising [3] candidate nuclei, labelled by the index i: i = 76 Ge, 82 Se, 100 Mo, 130 Te ,…”

Section: Introductionmentioning

confidence: 99%

Multi-isotope degeneracy of neutrinoless double-βdecay mechanisms in the quasiparticle random-phase approximation

et al. 2011

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“…Numerically, |α 32 − π| 0.16π. The effective mass (M ν ) ee for the neutrinoless double beta decay (See [29] for a review) is expressed as…”

Section: Doublet-model (We May Introduce An Extra Doublet Boson For Q...mentioning

confidence: 99%

Phenomenology in the Higgs triplet model with theA4symmetry

2010

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We discuss the phenomenology of doubly and singly charged Higgs bosons (of SU (2) L -triplet fields) in the simplest A 4 -symmetric version of the Higgs Triplet Model. Mass eigenstates of these Higgs bosons are obtained explicitly from the Higgs potential. It is shown that their decays into a pair of leptons have unique flavor structures which can be tested at the LHC if some of their masses are below the TeV scale. Sizable decay rates for τ → µee and τ → eµµ can be obtained naturally while other τ → ℓℓ ′ ℓ ′′ , µ →ēee, and ℓ → ℓ ′ γ are almost forbidden in this model. Contributions of these Higgs bosons to the non-standard interactions of neutrinos are also considered.

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“…An in-depth discussion on nuclear matrix elements is beyond the scope of this paper but for a more general survey of this problem see Ref. [16]. These matrix elements depend crucially on the Lorentz structure of the operator and the choice of nucleus.…”

Section: New Physics Contributionsmentioning

confidence: 99%

Effect of quark sector minimal flavor violation on neutrinoless double beta decay

Dudley

Kolda

2009

Phys. Rev. D

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The question of whether neutrino masses are Dirac or Majorana is one of the most important, and most difficult, questions remaining in the neutrino sector. Searches for neutrinoless double β-decay may help to resolve this question, but are also sensitive to new, higher dimension ∆L = 2 operators. In this paper we place two phenomenological constraints on these operators at dimension d ≤ 11. First, we require that the operators obey the quark flavor symmetries of the Standard Model, with any violation of the symmetries being due to Yukawa interactions, a scheme known as Minimal Flavor Violation (MFV). Second, we require that the operators which generate neutrinoless double β-decay, and any operators related by the flavor symmetries, do not induce neutrino masses above 0.05 eV, the limit implied by the atmospheric neutrino data. We find that these requirements severely constrain the operators which can violate lepton number, such that most can no longer contribute to neutrinoless double β-decay at observable rates. It is noteworthy that quark flavor symmetries can play such a strong role in constraining new leptonic physics, even when that physics is not quark flavor changing. Those few operators that can mimic a Majorana neutrino mass then appear with cutoffs below a TeV, and represent new physics which could be directly probed at the LHC or a future linear collider.

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Double Beta Decay, Majorana Neutrinos, and Neutrino Mass

Cited by 74 publications

References 123 publications

Multi-isotope degeneracy of neutrinoless double-βdecay mechanisms in the quasiparticle random-phase approximation

Multi-isotope degeneracy of neutrinoless double-βdecay mechanisms in the quasiparticle random-phase approximation

Phenomenology in the Higgs triplet model with theA4symmetry

Effect of quark sector minimal flavor violation on neutrinoless double beta decay

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