LHC dijet constraints on double beta decay

TL;DR

This paper uses LHC dijet data to set new constraints on neutrinoless double beta decay, linking collider searches for exotic resonances to rare nuclear decay processes, and projecting future limits.

Contribution

It introduces a novel method to derive double beta decay constraints from LHC dijet data, including projections for future collider runs and specific models like left-right symmetry.

Findings

Current LHC data already provide strong constraints on double beta decay.

Future LHC runs could push the half-life limits beyond 10^27 years.

Certain mass ranges for right-handed neutrinos remain challenging to test.

Abstract

We use LHC dijet data to derive constraints on neutrinoless double beta decay. Upper limits on cross sections for the production of "exotic" resonances, such as a right-handed W boson or a diquark, can be converted into lower limits on the double beta decay half-life for fixed choices of other parameters. Constraints derived from run-I data are already surprisingly strong and complementary to results from searches using same-sign dileptons plus jets. For the case of the left-right symmetric model, in case no new resonance is found in future runs of the LHC and assuming $g_L=g_R$, we estimate a lower limit on the double beta decay half-live larger than $10^{27}$ ys can be derived from future dijet data, except in the window of relatively light right-handed neutrino masses in the range $0.5$ MeV to $50$ GeV. Part of this mass window will be tested in the upcoming SHiP experiment. We also discuss current and future limits on possible scalar diquark contributions to double beta decay that can be derived from dijet data.