منابع مشابه
Nuclear moments for the neutrinoless double beta decay II
The recently developed formalism for the evaluation of nuclear form factors in neutrinoless double beta decay is applied to Ca, Ge, Se, Mo Te and Te nuclei. Explicit analytic expressions that follows from this theoretical development, in the single mode model for the decay of Ca, have been worked out. They are useful both for testing the full numerical calculations, and to check analytically th...
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An experimental observation of proton decay would be a spectacular proof of Grand Unification. Currently, the best constraint on the proton lifetime for the p → eπ decay channel, coming from the SuperKamiokande experiment, reaches 8 × 10 years. To improve the measurement, much bigger detectors should be constructed. Moreover, a better description of the bound-nucleon states and of the propagati...
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We calculate the width for the ω → ππ decay in nuclear medium. Chiral dynamics and low-density approximation are used. At densities around twice the nuclear saturation density we estimate the partial width for the decay of the longitudinal mode to be of the order of a few tens of MeV, and for the transverse mode a few times less.
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The evaluation of the nuclear matrix elements (NME) of the twoneutrino double beta (2νββ) decay and neutrinoless double beta (0νββ) decay using the proton-neutron quasiparticle random-phase approximation (pnQRPA) is addressed. In particular, the extraction of a proper value of the proton-neutron particle-particle interaction parameter, gpp, of this theory is analyzed in detail. Evidence is show...
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Study of the neutrinoless double beta decay, 0νββ, includes a variety of problems of nuclear structure theory. They are reviewed here. The problems range from the mechanism of the decay, i.e. exchange of the light Majorana neutrino neutrino vesus the exchange of some heavy, so far unobserved particle. Next, the proper expressions for the corresponding operator are described that should include ...
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ژورنال
عنوان ژورنال: Zeitschrift f�r Physik
سال: 1965
ISSN: 1434-6001,1434-601X
DOI: 10.1007/bf01384440