Skip to main content

Direct neutrino mass measurement with sub-eV sensitivity with the Karlsruhe Tritium Neutrino Experiment (KATRIN)

Direct neutrino mass measurement with sub-eV sensitivity with the Karlsruhe Tritium Neutrino Experiment (KATRIN)

  • Date 13 Oct 2021
  • Time 15:30 - 16:30
  • Category Seminar

Dr Magnus Schlösser (Karlsruhe Institute of Technology)

The Karlsruhe Tritium Neutrino (KATRIN) experiment probes the effective electron anti-neutrino mass, mν, via a high-precision measurement of the tritium β-decay spectrum close to its endpoint at 18.6keV. In this talk I present the second physics run. The source activity was increased by a factor of 3.8 and the background was reduced by 25% with respect to the first campaign. A sensitivity on mν of 0.7eV/c2 at 90% confidence level (CL) was reached. This is the first sub-eV sensitivity from a direct neutrino-mass experiment. The best fit to the spectral data yields m2ν=(0.26±0.34)eV2/c4, resulting in an upper limit of mν<0.9eV/c2 (90% CL). By combining this result with the first neutrino mass campaign, we find an upper limit of mν<0.8eV/c2 (90% CL).

2021 10 13 Direct neutrino mass measurement with sub-eV sensitivity with the Karlsruhe Tritium Neutrino Experiment (KATRIN)

Related topics

Explore Royal Holloway

Get help paying for your studies at Royal Holloway through a range of scholarships and bursaries.

There are lots of exciting ways to get involved at Royal Holloway. Discover new interests and enjoy existing ones

Heading to university is exciting. Finding the right place to live will get you off to a good start

Whether you need support with your health or practical advice on budgeting or finding part-time work, we can help

Discover more about our 21 departments and schools

Find out why Royal Holloway is in the top 25% of UK universities for research rated ‘world-leading’ or ‘internationally excellent’

Royal Holloway is a research intensive university and our academics collaborate across disciplines to achieve excellence.

Discover world-class research at Royal Holloway

Discover more about who we are today, and our vision for the future

Royal Holloway began as two pioneering colleges for the education of women in the 19th century, and their spirit lives on today

We’ve played a role in thousands of careers, some of them particularly remarkable

Find about our decision-making processes and the people who lead and manage Royal Holloway today