Latest results from the HEIDELBERG-MOSCOW double beta decay experiment

Klapdor‐Kleingrothaus, H. V.; Dietz, A.; Baudis, L.; Heusser, G.; Krivosheina, I. V.; Kolb, St.; Majorovits, B.; Paes, H.; Strecker, H.; Alexeev, V.I.; Balysh, A.; Bakalyarov, A. M.; Belyaev, S. T.; Lebedev, V. I.; Жуков, С. В.

doi:10.1007/s100500170022

Cited by 619 publications

(462 citation statements)

References 26 publications

(10 reference statements)

Supporting

Mentioning

439

Contrasting

Order By: Relevance

“…Optimal ββ(0ν) sensitivities have been reached in a series of experiments based on the calorimetric approach. In particular, the best limit on ββ(0ν) comes from the Heidelberg-Moscow (HM) experiment [37] on 76 Ge (Fig. 3) even if similar results have been obtained also by the IGEX experiment [38] (Tab.…”

Section: Present and Past Experimentsmentioning

confidence: 59%

Neutrinoless double beta decay: Present and future

Cremonesi¹

2003

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

Present status, and future plans for Double Beta Decay searches are reviewed. Given the recent observations of neutrino oscillations, a possibility to observe ββ(0ν) at a neutrino mass scale suggested by present experimental results (mν ≈10-50 meV) could actually exist. The achievement of the required experimental sensitivity is a real challenge faced by a series of new proposed projects. Plans to achieve such a result are described.

show abstract

Section: Present and Past Experimentsmentioning

confidence: 59%

Neutrinoless double beta decay: Present and future

Cremonesi¹

2003

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

show abstract

“…In general, due to smallness of the 1-3 mixing the contribution of ν 3 is very small: If the Heidelberg-Moscow positive result [3,4,5,6,7] is confirmed, either our approach, at least in its present form, is not correct or another mechanism, different from the Majorana mass of the light neutrinos gives main contribution to the decay rate.…”

Section: A 1-3 Mixingmentioning

confidence: 83%

Neutrino masses and mixing: singular mass matrices and quark–lepton symmetry

Doršner

Smirnov

2004

Nuclear Physics B

View full text Add to dashboard Cite

We suggest an approach to explain the observed pattern of the neutrino masses and mixing which employs the weakly violated quark-lepton equality and does not require introduction of an ad hoc symmetry of the neutrino sector. The mass matrices are nearly equal for all quarks and leptons. They have very small determinant and hierarchical form with expansion parameter λ ∼ sin θ c ∼ m µ /m τ . The latter can be realized, e.g., in the model with U (1) family symmetry.The equality is violated at the ∼ λ 2 level. Large lepton mixing appears as a result of summation of the neutrino and charged lepton rotations which diagonalize corresponding mass matrices in contrast with the quark sector where the up quark and down quark rotations cancel each other.We show that the flip of the sign of rotation in the neutrino sector is a result of the seesaw mechanism which also enhances the neutrino mixing. In this approach one expects, in general, deviation of the 2-3 mixing from maximal, s 13 ∼ (1 -3)λ 2 , hierarchical neutrino mass spectrum, and m ee < 10 −2 eV. The scenario is consistent with the thermal leptogenesis and (in SUSY context) bounds on lepton number violating processes, like µ → eγ.

show abstract

“…The results reported in [21] will be checked in the currently running and forthcoming NDB experiments. There are a large number of projects such as CUORICINO [23], CUORE [24], GERDA [25], MAJORANA [26], SuperNEMO [27], EXO [28], GENIUS [29] which aim to achieve a sensitivity upto 0.01eV for M ee . Cosmological observations put an upper bound on the sum of neutrino masses…”

Section: Numerical Resultsmentioning

confidence: 99%

Broken S3 symmetry in the neutrino mass matrix and non-zero θ13

2012

View full text Add to dashboard Cite

We study the effects of breaking S 3 symmetry in the neutrino mass matrix for the masses and mixing matrix of neutrinos. At zeroth order the model gives degenerate neutrino masses and accommodates tribimaximal mixing. We introduce perturbations in terms of a small and complex parameter. The perturbations are introduced in a manner such that the S 3 symmetry is broken by its elements in the same representation. Successive perturbations introduce mass splitting, sizable non-zero reactor mixing angle and CP violation. This scheme of breaking S 3 symmetry can reproduce a relatively large reactor mixing angle as suggested by the recent T2K results. The effective neutrino mass is predicted to be large which is testable in the ongoing and forthcoming neutrinoless double beta decay experiments. IntroductionAfter the discovery of neutrino oscillations, there has been considerable progress in determining the values of the neutrino mass-squared differences and the mixing angles which relate the neutrino mass eigenstates to the flavor eigenstates. Recently, T2K [1], MINOS [2] and Double Chooz [3] experiments have given hints of a relatively large 1-3 mixing angle. This has given a fresh impetus to the construction of neutrino mass models which can accommodate a non-zero value of θ 13 . Recently many papers have appeared which reproduce the * dev5703@yahoo.com †

show abstract

Latest results from the HEIDELBERG-MOSCOW double beta decay experiment

Cited by 619 publications

References 26 publications

Neutrinoless double beta decay: Present and future

Neutrinoless double beta decay: Present and future

Neutrino masses and mixing: singular mass matrices and quark–lepton symmetry

Broken S3 symmetry in the neutrino mass matrix and non-zero θ13

Contact Info

Product

Resources

About