Paper

Search for Lorentz-Invariance Violation with the first KATRIN data

Malcherek, E, Ryšavý, M, Schwemmer, A, Kopmann, A, Rodejohann, W, Wydra, J, Wüstling, S, Hiller, R, Lasserre, T, Thümmler, T, Fränkle, F M, Krause, H, Köllenberger, L, Krasch, B, Šefčík, M, Haußmann, N, Röllig, M, Ellinger, E, Berlev, A, Jansen, A, Schlüter, L, Beglarian, A, Wickles, J, maggio, J A, Sibille, V, Deffert, M, Grössle, R, Parno, D S, La Cascio, L, Martin, E L, Lokhov, A, Drexlin, G, Telle, H H, Huber, A, Siegmann, D, Gavin, A S, Schäfer, P, Friedel, F, Röttele, C, Wilkerson, J F, Aker, M, Zeller, G, Batzler, D, Besserer, U, Neumann, H, Rodenbeck, C, Spanier, F, Gil, W, Salomon, R, Thorne, L A, Robertson, R G H, Titov, N, Schlösser, K, Vénos, D, Schlösser, M, Franklin, G B, Wolf, J, Carney, R M D, Karl, C, Priester, F, Bornschein, B, Mark, M, Saenz, A, Bobien, S, Engel, R, Helbing, K, Melzer, C, Bornschein, L, Wetter, M, Edzards, F, Slezák, M, Sack, R, Debowski, K, Böttcher, M, Glück, F, Marsteller, A, Schimpf, L, Schneidewind, S, Vizcaya Hernández, A P, Brunst, T, Behrens, J, Köhler, C, Tkachev, I, Caldwell, T S, Dragoun, O, D Díaz Barrero, Hillesheimer, D, Valerius, K, Lehnert, B, W Xu, Fulst, A, Hinz, D, Wiesinger, C, Houdy, T, Müller, K, Schrank, M, Kellerer

2022

Overview

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\\cdot10^{-6}\\) GeV at 90\\% confidence level. Moreover, we derive new constraints on \\((a_{\\text{of}}^{(3)})_{00}\\) and \\((a_{\\text{of}}^{(3)})_{10}\\).

• Publisher: Cornell University Library, arXiv.org
• Subject: Confidence intervals / Invariance / Neutrinos / Parameters / Particle physics / Standard model (particle physics)