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2 edition of Double beta decay and majorana neutrino found in the catalog.

Double beta decay and majorana neutrino

Masaru Doi

Double beta decay and majorana neutrino

by Masaru Doi

  • 44 Want to read
  • 22 Currently reading

Published by Kyoto University for the Research Institute for Fundamental Physics and the Physical Society of Japan in Kyoto .
Written in English


Edition Notes

Statementby Masaru Doi, Tsuneyuki Kotani and Eiichi Takasugi.
SeriesProgress of theoretical physics -- no.83
ContributionsKotani, Tsuneyuki., Takasugi, Eiichi.
ID Numbers
Open LibraryOL14836671M

Majorana neutrino mass from the neutrinoless double beta decay, one assumes that this is the leading term and one can neglect the rest. But one needs apart of the data a reliable value for the matrix element. In the second chapter we will compare the different methods to calculate these matrix elements. 2.   Search for the Neutrinoless double beta decay can answer this question and provide the absolute mass of the neutrinos, which is the most important unknown parameter in neutrino physics at present. In this effort the main problem is to detect this extremely rare process.

  In the two-neutrino version, the released energy varies but is always smaller than for neutrinoless double-beta decay.” The MAJORANA DEMONSTRATOR has shown that the neutrinoless double-beta decay half-life of Ge is at least 10 25 years—15 orders of magnitude longer than the age of the universe. So it’s impossible to wait for a single.   Abstract. Neutrino-less double beta decays (0νββ) are sensitive and realistic probes for studying the Majorana nature of neutrinos (ν), the ν-mass spectrum, the absolute ν-mass scale, the Majorana CP phases and other fundamental properties of neutrinos and weak t 0νββ experiments, which use detectors with the mass sensitivity of the order of meV, study the ν.

To pin down the Majorana neutrino, the researchers are looking for a telltale indicator, a rare nuclear process called neutrinoless double-beta decay. This process is expected to occur infrequently, if at all: less than once every septillion (a trillion trillion, or, a 1 followed by 24 zeros) years per nucleus. Neutrinoless double-beta decay. Scientists are looking for lepton number violation in a process called double beta decay, says SLAC theorist Alexander Friedland, who specializes in the study of neutrinos. In its common form, double beta decay is a process in which a nucleus decays into a different nucleus and emits two electrons and two.


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Double beta decay and majorana neutrino by Masaru Doi Download PDF EPUB FB2

The Majorana character of neutrinos would make possible the neutrinoless double-β (0νββ) decay, a matter-creating process without the balancing emission of antimatter. The GERDA Collaboration searches for the 0νββ decay of 76Ge by operating bare germanium detectors in an active liquid argon by: The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana particle and provide information on the absolute scale of neutrino mass.

If the neutrino is a Majorana particle, neutrinos could provide a mechanism for. Double Beta Decay, Majorana Neutrinos, and Neutrino Mass Article (PDF Available) in Review of Modern Physics 80(2) August with Reads How we measure 'reads'.

Nature of the neutrino (Dirac/Majorana) - Double beta decay with or without neutrinos. S.T. Petcov (SISSA, Trieste and ; INFN, Trieste) Proceedings of the International Conference on History of the Neutrino, Paris, France, September(eds. Cribier, J. Dumarchez, D. Vignaud, AstroParticle and Cosmology Laboratory, May ), p.

MAJORANA NEUTRINOS 8 III. RATE OF DOUBLE-BETA DECAY 13 IV. DOUBLE-BETA DECAY AND NEW PHYSICS 19 A. Neutrino Mass 19 B. The Majorana Phases 21 C. Sterile Neutrinos 23 D. Alternative Mechanisms 24 V.

CALCULATING NUCLEAR MATRIX ELEMENTS 25 A. Nuclear-Structure Theory 25 B. QRPA 27 C. Shell Model 31 D. Prospects for the future 33 VI. Observation of neutrinoless double-beta (0νββ) decay would signal violation of total lepton number conservation.

The process can be mediated by an exchange of a light Majorana neutrino, or by an exchange of other particles. However, the existence of 0νββ-decay requires Majorana neutrino mass, no matter what the actual mechanism is.

In a study published in Physical Review Letters, collaborators of the MAJORANA DEMONSTRATOR, an experiment led by the Department of Energy’s Oak Ridge National Laboratory, have shown they can shield a sensitive, scalable kilogram germanium detector array from background radioactivity.

Observation of neutrinoless double-beta (0νββ) decay would signal violation of total lepton orbyanexchangeofotherparticles. However,theexistenceof0νββ-decayrequiresanonvanishing Majorana neutrino mass, no matter what the actual mechanism is. These limits are listed in the Double-βDecay Listings of the experimental measure.

Masaru Doi, Tsuneyuki Kotani, Eiichi Takasugi, Double Beta Decay and Majorana Neutrino, Progress of Theoretical Physics Supplement, Vol MarchPages 1–, () pp. –Neutrino Emitting Modes of Double Beta Decay Masaru Doi and Tsuneyuki Kotani. Progress of Theoretical Physics Vol.

89 No. 1 () Cited by: The neutrinoless double beta decay (0νββ) is a commonly proposed and experimentally pursued theoretical radioactive decay process that would prove a Majorana nature of the neutrino particle. To this day, it has not been found.

The discovery of the neutrinoless double beta decay could shed light on the absolute neutrino masses and on their mass hierarchy (Neutrino mass). Home > Journal of the Physical Society of Japan > Vol Number 8 > Double Beta Decays and Neutrino Masses J.

Phys. Soc. Jpn. 74, pp. () [27 Pages] Next Article». the majorana neutrinoless double-beta decay experiment / university of washington Neutrinos, unambiguously, cannot be the massless particles that they were originally hypothesized to be.

Abstract. The neutrino is one of the best examples for the merging of the different disciplines of micro- and macrophysics. The neutrino plays, by its nature (Majorana or Dirac particle) and its mass, a key role for the structure of modern particle physics theories (GUTs, SUSYs, SUGRAs,) [1]–[3].

Assuming 3- ν mixing and massive Majorana neutrinos, we analyze the possibility of establishing the existence of CP violation associated with Majorana neutrinos in the lepton sector by (i) measuring of the effective Majorana mass |〈 m 〉| in neutrinoless double beta decay with a sufficient precision and (ii) by measuring of, or obtaining a.

Experimental nuclear matrix elements M 2ν for two neutrino double beta decays (2νββ) are discussed in terms of experimental nuclear matrix elements for successive single-β processes via Fermi-surface (low-lying) quasi-particle states (FSQP). They are reproduced approximately by the sum Σ L M k of the 2νββ matrix elements M k through k -th intermediate quasi-particle states in the.

Les neutrinos posent de nombreuses questions dont la résolution nécessiterait une nouvelle physique. En retour, cette dernière permettrait de résoudre plusieurs énigmes en cosmologie dont. The Majorana Zero Neutrino Double-Beta Decay Experiment Draft Page 3 Majorana Science Motivation The neutrino mass range of interest favored by the results of neutrino oscillation experiments is now within the grasp of a well-designed germanium 0ν ββ-decay experiment.

This well established technique has been augmented by the availability of. Figure 1: “Two-neutrino” double-beta decay (left) is allowed in certain isotopes and involves the transformation of two neutrons into two protons, two electrons, and two antineutrinos.

If neutrinos are Majorana particles then a neutrinoless form of this double-beta decay should be allowed. Different models for the decay describe it in terms of the creation and destruction of a Majorana.

The neutrino mass problem leads us to physics beyond the SM. Alternative examples of Majorana particles include weakly interacting dark matter candidates and Majorana zero modes in solid state systems (Elliott and Franz, ). Searches for neutrinoless double-beta (0ν2β−) decay, neutrinoless double-electron capture (0ν2EC) by nuclei and.

A double-beta decay observation would demonstrate that neutrinos are Majorana particles, provide information about the neutrino-mass scale and hierarchy, and address physics beyond the Standard Model (BSM).

The rate of the decay, however, depends on matrix elements that cannot be measured. Abstract. We give a review on neutrino models in which Majorana neutrino masses are generated radiatively through loop diagrams.

In particular, we concentrate on the two-loop models which contain extra doubly charged singlet Φ and triplet ∆ scalars beyond the standard model so that the new Yukawa Ψ {bar{ℓ}}_{R}^{c} ℓ_{R} and effective ψ ±± W ∓ W ∓ couplings can be induced.DOUBLE BETA DECAY AND NEUTRINO MASSES Francesco Iachello Yale University Lecture 3.

22 2 AA Ettore Majorana. 23/2 2 d expected half-lives for neutrinoless double beta decay, double positron decay and double resonant electron capture. HALF-LIVES 0 1 22 1/2 0 0. Neutrinoless double beta decay is usually discussed in connection with Majorana neutrino masses. However, it is well-known that many different contributions to the decay amplitude could in principle exist.