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

References in corpus (14)

• Phase space factors for double-$\beta$ decay
• Disassembling the Nuclear Matrix Elements of the Neutrinoless double beta Decay
• Limit on Neutrinoless ββ Decay of Xe-136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge-76
• Energy density functional study of nuclear matrix elements for neutrinoless $\beta \beta$ decay
• Nuclear matrix elements for double-β decay
• $0\nu \beta \beta$ and $2\nu \beta \beta$ nuclear matrix elements, QRPA, and isospin symmetry restoration
• Left-Right Symmetry: from LHC to Neutrinoless Double Beta Decay
• Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at sqrt(s) = 8 TeV
• Arbitrary mass Majorana neutrinos in neutrinoless double beta decay
• TeV Scale Left-Right Symmetry and Large Mixing Effects in Neutrinoless Double Beta Decay
• Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at sqrt(s) = 8 TeV
• Pion dominance in RPV SUSY induced neutrinoless double beta decay
• Explaining a CMS $eejj$ Excess With $\mathcal{R}-$parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay
• Resonant Slepton Production Yields CMS $eejj$ and $ejj$ Missing $p_T$ Excesses

Cited by in corpus (3)

• Neutrino Jets from High-Mass $W_R$ Gauge Bosons in TeV-Scale Left-Right Symmetric Models
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry