QCD-improved limits from neutrinoless double beta decay

Abstract

We analyze the impact of QCD corrections on limits derived from neutrinoless double beta decay ($0\nu \beta \beta$). As demonstrated previously, the effect of the color-mismatch arising from loops with gluons linking the quarks from different color-singlet currents participating in the effective operators has a dramatic impact on the predictions for some particular Wilson coefficients. Here, we consider all possible contributions from heavy particle exchange, i.e. the so-called short-range mechanism of $0\nu \beta \beta$ decay. All high-scale models (HSM) in this class match at some scale around a $\sim$ few TeV with the corresponding effective theory, containing a certain set of effective dimension-9 operators. Many of these HSM receive contributions from more than one of the basic operators and we calculate limits on these models using the latest experimental data. We also show with one non-trivial example, how to derive limits on more complicated models, in which many different Feynman diagrams contribute to $0\nu \beta \beta$ decay, using our general method.

18 pages, 13 figures

References in corpus (4)

• Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen
• QCD Corrections and Long-Range Mechanisms of neutrinoless double beta decay
• Nucleon tensor form factors in a relativistic confined quark model
• Scalar-mediated double beta decay and LHC

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• Neutrinoless Double Beta Decay via Light Neutralinos in R-Parity Violating Supersymmetry
• Neutrinoless double beta decay and QCD running at low energy scales
• Gauge vectors and double beta decay
• $\Delta$L=2 hyperon decays induced by Majorana neutrinos and doubly-charged scalars
• RGE effects on the LFV scale from meson decays
• The Neutrinoless Double Beta Decay in the Colored Zee-Babu Model
• QCD Running in Lepton Number Violating Meson and Tau Decays
• $\rho$ exchange contribution to neutrinoless double beta decay
• Radiative neutrino masses: A window to new physics