We present the search for Lorentz violation in the double beta decay of ${}^{82}\mathrm{Se}$ with CUPID-0, using an exposure of $9.95\mathrm{kg}\times \mathrm{yr}$. We found no evidence for the searched signal and set a limit on the isotropic components of the Lorentz violating coefficient of ${\stackrel{\circ }{a}}_{\mathrm{of}}^{(3)}<4.1\times {10}^{-6}\mathrm{GeV}$ (90% credible interval). This results is obtained with a Bayesian analysis of the experimental data and fully includes the systematic uncertainties of the model. This is the first limit on ${\stackrel{\circ }{a}}_{\mathrm{of}}^{(3)}$ obtained with a scintillating bolometer, showing the potentiality of this technique.

• Received 12 June 2019
• Revised 5 August 2019

DOI:https://doi.org/10.1103/PhysRevD.100.092002