[Triumf-seminars] TRIUMF Particle Phys/SciTec Seminar today at 13:30

[TRIUMF Seminars]

Date/Time: Fri 2023-12-15 at 13:30

Location:  MOB Conference Rm   

Speaker:   Lisa Schlueter (Lawrence Berkeley Natl. Lab.)

Title:     Latest results from the KATRIN experiment - Neutrino mass and light sterile neutrinos

Abstract: *** In conjunction with the seminar by Ann-Katherin Schuetz ***

The KArlsruhe TRItium Neutrino (KATRIN) experiment is designed to determine the effective mass of the
electron-antineutrino with a target sensitivity of 200 meV/c2 (90% C.L.) in a direct and model-independent way. KATRIN uses a strong gaseous windowless Tritium source associated with a large high-resolution spectrometer (MAC-E filter) to analyze precisely the electron energies from the source. The neutrino mass can be inferred from the shape of the tritium β-decay spectrum in the endpoint region. After global commissioning of the apparatus with Tritium in 2018, KATRIN started its first neutrino mass measurement campaign in spring 2019. This talk presents the data and the analysis of the first two measurement campaigns. In terms of effective electron antineutrino mass, an upper limit of 0.8 eV (90% C.L.) could be inferred, reaching for the first time into the sub-eV regime. Moreover, to exploit the full physics potential of the KATRIN experiment, a search for light sterile neutrinos was conducted. As no sterile-neutrino signal is observed, exclusion contours are drawn at 95% C.L. covering the parameter space of the long-persisting light-sterile neutrino anomalies to a great extent.

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Meeting URL:
https://ubc.zoom.us/j/64196797016?pwd=U0tRSS9jUERXYTZXcmxwRDJjNGhvZz09&from=addon
Meeting ID:
641 9679 7016
Passcode:
884815



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