Limiting the Effective Mass and New Physics Parameters from $0\nu \beta \beta$

Abstract

In the light of the recent result from KamLAND-Zen (KLZ) and GERDA Phase-II, we update the bounds on the effective mass and the new physics parameters, relevant for neutrinoless double beta decay ($0\nu \beta \beta$). In addition to the light Majorana neutrino exchange, we analyze beyond standard model contributions that arise in Left-Right symmetry and R-Parity violating supersymmetry. The improved limit from KLZ constrains the effective mass of light neutrino exchange down to sub-eV mass regime 0.06 eV. Using the correlation between the ${}^{136}\mathrm{Xe}$ and ${}^{76}\mathrm{Ge}$ half-lives, we show that the KLZ limit individually rules out the positive claim of observation of $0\nu \beta \beta$ for all nuclear matrix element compilation. For the Left-Right symmetry and R-parity violating supersymmetry, the KLZ bound implies a factor of 2 improvement of the effective mass and the new physics parameters. The future ton scale experiments such as, nEXO will further constrain these models, in particular, will rule out standard as well as Type-II dominating LRSM inverted hierarchy scenario.

9 pages, 7 pdf figures, 7 tables, results from GERDA Phase-II included, to appear in PRD

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Cited by in corpus (8)

• Neutrino Jets from High-Mass $W_R$ Gauge Bosons in TeV-Scale Left-Right Symmetric Models
• Higgs Sector of the Left-Right Symmetric Theory
• Constraining Right Handed Gauge Boson Mass from Lepton Number Violating Meson Decays in a Low Scale Left Right Model
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• Neutrinoless double beta decay in minimal left-right symmetric model with universal seesaw
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• Effect of large light-heavy neutrino mixing and natural type-II seesaw dominance to lepton flavor violation and neutrinoless double beta decay
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry