Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 7: Neutrino physics 1
T 7.2: Vortrag
Montag, 4. März 2024, 16:15–16:30, Geb. 30.21: Gerthsen-HS
A Look at General Neutrino Interactions with KATRIN — •Caroline Fengler for the KATRIN collaboration — Karlsruhe Institute of Technology, Karlsruhe, Germany
The KATRIN experiment aims to measure the neutrino mass by precision spectroscopy of tritium β-decay. Recently, KATRIN has improved the upper bound on the effective electron-neutrino mass to 0.8 eV/c2 at 90 % CL [1] and is continuing to take data for a target sensitivity of better than 0.3 eV/c2. In addition to the search for the neutrino mass, the ultra-precise measurement of the β-spectrum can be used to probe physics beyond the Standard Model. In particular, general neutrino interactions (GNI) [2] can be investigated through a search for potential shape variations of the β-spectrum. For this purpose, all theoretically allowed interaction terms for neutrinos are combined in one effective field theory. This enables a model-independent description of novel interactions, which could provide small contributions to the weak interaction. Such potential modifications can then be identified in the KATRIN β-spectrum by means of energy-dependent contributions to the rate. The talk will introduce the theoretical background of the general neutrino interactions, give an overview of the analysis method and present recent sensitivity studies.
[1] Nat. Phys. 18 (2022) 160-166 [2] Nucl. Phys. B947 (2019) 114746
This work is supported by the Helmholtz Association and by the Ministry for Education and Research BMBF (grant numbers 05A23PMA, 05A23PX2, 05A23VK2 and 05A23WO6).
Keywords: KATRIN; Neutrino; BSM