Cancellations in neutrinoless double beta decay and the neutrino mass matrix

Rodejohann, Werner

doi:10.1016/s0550-3213(00)00728-8

Cited by 70 publications

(42 citation statements)

References 53 publications

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“…We find that there is practically no difference when one takes this matrix or the simple form in Eq. (25), showing the model independence of our scenario.…”

Section: Numerical Resultsmentioning

confidence: 73%

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A simple connection between neutrino oscillation and leptogenesis

Joshipura

Paschos

Rodejohann

2001

J. High Energy Phys.

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101

105

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The usual see-saw formula is modified by the presence of two Higgs triplets in left-right symmetric theories. The contribution from the left-handed Higgs triplet to the see-saw formula can dominate over the conventional one when the neutrino Dirac mass matrix is identified with the charged lepton or down quark mass matrix. In this case an analytic calculation of the lepton asymmetry, generated by the decay of the lightest right-handed Majorana neutrino, is possible. For typical parameters, the out-of-equilibrium condition for the decay is automatically fulfilled. The baryon asymmetry has the correct order of magnitude, as long as the lightest mass eigenstate is not much lighter then 10 −6 to 10 −8 eV, depending on the solution of the solar neutrino problem. A sizable signal in neutrinoless double beta decay can be expected, as long as the smallest mass eigenstate is not much lighter than 10 −3 eV and the Dirac mass matrix is identified with the charged lepton mass matrix. *

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“…We find that there is practically no difference when one takes this matrix or the simple form in Eq. (25), showing the model independence of our scenario.…”

Section: Numerical Resultsmentioning

confidence: 73%

“…The other two "Majorana phases" α and β can be investigated in neutrinoless double beta decay [24,25]. The choice of the parameterization in Eq.…”

Section: Neutrino Mass Matrixmentioning

confidence: 99%

A simple connection between neutrino oscillation and leptogenesis

Joshipura

Paschos

Rodejohann

2001

J. High Energy Phys.

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101

105

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“…We see from (30) that almost all of the allowed regions are well within the reach of GENIUS except for φ = π for which case we arrive at tan 2β ≃ −16J CP . Therefore, for a null 0νββ result, the Majorana phase β is determined by the amount of CP violation in oscillation experiments.…”

Section: Effects Due To the Atmospheric Scalementioning

confidence: 59%

“…5 and 6 the value of m for different ∆m is required in order to give accessible m . We note that the cases α = π or π/2 together with β = π or π/2 are situations in which one can not distinguish CP violation from CP conservation in 0νββ [30].…”

Section: Qvo Solutionmentioning

confidence: 91%

Leptogenesis and low energy observables in left-right symmetric models

Balaji

Rodejohann

2002

Phys. Rev. D

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In the context of left-right symmetric models we study the connection of leptogenesis and low energy parameters such as neutrinoless double beta decay and leptonic CP violation. Upon imposition of a unitarity constraint, the neutrino parameters are significantly restricted and the Majorana phases are determined within a narrow range, depending on the kind of solar solution. One of the Majorana phases gets determined to a good accuracy and thereby the second phase can be probed from the results of neutrinoless double beta decay experiments. We examine the contributions of the solar and atmospheric mass squared differences to the asymmetry and find that in general the solar scale dominates. In order to let the atmospheric scale dominate, some finetuning between one of the Majorana phases and the Dirac CP phase is required. In this case, one of the Majorana phases is determined by the amount of CP violation in oscillation experiments. *

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“…[45][46][47][48]) and, possibly, might provide some information on the presence of CP-violation in the lepton sector due to Majorana CP-violating phases [49] (see also Refs. [46,48,50,51]). 3 New approaches which exploit other neutrino oscillations channels such as muon neutrino disappearance have been proposed [70] for determining the type of hierarchy.…”

Section: Introductionmentioning

confidence: 99%

Determining the neutrino mass hierarchy andCP-violation inNOνAwith a second off-axis detector

2006

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We consider a Super-NO A-like experimental configuration based on the use of two detectors in a long-baseline experiment as NO A. We take the far detector as in the present NO A proposal and add a second detector at a shorter baseline. The location of the second off-axis detector is chosen such that the ratio L=E is the same for both detectors, being L the baseline and E the neutrino energy. We consider liquid argon and water-Č erenkov techniques for the second off-axis detector and study, for different experimental setups, the detector mass required for the determination of the neutrino mass hierarchy, for different values of 13 . We also study the capabilities of such an experimental setup for determining CP-violation in the neutrino sector. Our results show that by adding a second off-axis detector a remarkable enhancement on the capabilities of the current NO A experiment could be achieved.

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Cancellations in neutrinoless double beta decay and the neutrino mass matrix

Cited by 70 publications

References 53 publications

A simple connection between neutrino oscillation and leptogenesis

A simple connection between neutrino oscillation and leptogenesis

Leptogenesis and low energy observables in left-right symmetric models

Determining the neutrino mass hierarchy andCP-violation inNOνAwith a second off-axis detector

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