Friday, 6 December 2024 at 14h00
Seminar room 7/8, ILL 1
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ZOOM link: https://ill.zoom.us/j/97312821307?pwd=BQ5aamuFbpUbcb9RgyGPUiaWmFzIt3.1
password : 324899
“ The WISArD experiment - Searching for exotic weak couplings with nuclear beta decay ”
Maud Versteegen
LP2I - Bordeaux, versteeg@cenbg.in2p3.fr
The Standard Model of particle physics is one of the greatest achievments of the past century. Its many successes need not be advertised, neither does its incredible internal consistency. It is however incomplete, leaving open questions such as neutrino oscillations, the matter-antimatter asymmetry or the inclusion of gravity. The search for physics beyond the Standard Model had thus actively been going on. The energy frontier at LHC is directly looking for new particles, the intensity frontier tries to observe highly suppressed processes or very weakly interacting particles by increasing luminosity and the precision frontier is pushing the limits of high precision measurements to test Standard Model predictions and uncover possible contributions of New Physics.
Nuclear beta decay plays a central role in this context. It paved the way of the Standard Model of the weak interaction, establishing its V −A structure and its maximal violation of parity for instance. It brings the most precise value of the first top-row element of the Cabbibo-Kobayashi-Maskawa quark mixing matrix, Vud, to this day and it is used to probe the existence of New Physics in the weak sector.
In this presentation, I will show how high precision measurements of nuclear beta decay observables bring stringent constraints on TeV-scale extensions of the Standard Model, which are comparable and complementary to LHC bounds. I will focus on the search for exotic currents in the weak interaction, in the context of the WISArD experiment, which is currently installed at ISOLDE-CERN.
Hanno FILTER (College 3 Secretary)
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