Updated constraints on the light-neutrino exchange mechanisms of the 0νββ-decay

Journal Article · Wed Oct 28 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4934912· OSTI ID:22492675

Štefánik, Dušan ^[1]; Dvornický, Rastislav ^[1]; Šimkovic, Fedor ^[1]

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1. Comenius University, Mlynská dolina F1, SK-842 48 Bratislava (Slovakia)

The neutrinoless double-beta (0νββ) decay associated with light neutrino exchange mechanisms, which are due to both left-handed V-A and right-handed V+A leptonic and hadronic currents, is discussed by using the recent progress achieved by the GERDA, EXO and KamlandZen experiments. The upper limits for effective neutrino mass m{sub ββ} and the parameters 〈λ〉 and 〈η〉 characterizing the right handed current mechanisms are deduced from the data on the 0νββ-decay of {sup 76}Ge and {sup 136}Xe using nuclear matrix elements calculated within the nuclear shell model and quasiparticle random phase approximation and phase-space factors calculated with exact Dirac wave functions with finite nuclear size and electron screening. The careful analysis of upper constraints on effective lepton number violating parameters assumes a competition of the above mechanisms and arbitrary values of involved CP violating phases.

• OSTI ID: 22492675
• Journal Information: AIP Conference Proceedings, Vol. 1686, Issue 1; Conference: MEDEX'15: Workshop on calculation of double-beta-decay matrix elements, Prague (Czech Republic), 9-12 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CP INVARIANCE
CURRENTS
DIRAC EQUATION
DOUBLE BETA DECAY
ELECTRONS
GERMANIUM 76
HADRONS
LEPTON NUMBER
LIMITING VALUES
NEUTRINOS
NUCLEAR MATRIX
PHASE SPACE
RANDOM PHASE APPROXIMATION
SCREENING
SHELL MODELS
WAVE FUNCTIONS
XENON 136