Search for Lorentz-Invariance Violation with the first KATRIN data

Abstract

Some extensions of the Standard Model of Particle Physics allow for Lorentz invariance and Charge-Parity-Time (CPT)-invariance violations. In the neutrino sector strong constraints have been set by neutrino-oscillation and time-of-flight experiments. However, some Lorentz-invariance-violating parameters are not accessible via these probes. In this work, we focus on the parameters $(a_{\text{of}}^{(3)}{)}_{00}$, $(a_{\text{of}}^{(3)}{)}_{10}$ and $(a_{\text{of}}^{(3)}{)}_{11}$ which would manifest themselves in a non-isotropic beta-decaying source as a sidereal oscillation and an overall shift of the spectral endpoint. Based on the data of the first scientific run of the KATRIN experiment, we set the first limit on $\left|(a_{\text{of}}^{(3)}{)}_{11}\right|$ of $<3.7\cdot 10^{-6}$ GeV at 90\% confidence level. Moreover, we derive new constraints on $(a_{\text{of}}^{(3)}{)}_{00}$ and $(a_{\text{of}}^{(3)}{)}_{10}$.

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Cited by in corpus (5)

• Direct neutrino-mass measurement based on 259 days of KATRIN data
• Probing Beyond the Standard Model Physics with Double-beta Decays
• Searches for beyond-standard-model physics with astroparticle physics instruments
• Constraining the isotropic CPT-odd coefficients of the Standard Model Extension by a combined DUNE and ESSnuSB analysis
• Indications against dynamical CPT symmetry restoration in quantum gravity