Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Tests of symmetries and conservation laws
WISArD : Weak Interaction Studies with 32Ar Decay
P. Alfaurt, P. Ascher, D. Atanasov, B. Blank, F. Cresto, L. Daudin, X. Fléchard, M. Gerbaux, J. Giovinazzo, S. Grévy, T. Kurtukian-Nieto, E. Liénard, M. Pomorski, N. Severijns, S. Vanlangendonck, M. Versteegen* and D. Zakoucky
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Pre-published on: March 02, 2022
Published on:
Abstract
The WISArD experiment is probing the possible existence of exotic currents in the electroweak sector using nuclear $\beta$ decay, to improve the constraints on beyond Standard Model physics. The setup of the experiment underwent a full upgrade between 2018 and 2021 in preparation of a second run of data taking at ISOLDE, CERN, scheduled for October 2021. The detector stage was completely renewed to improve statistics and minimize the main systematic effects identified in a proof-of-principle run in 2018. With this upgrade, the objective is to reach the per-mil level of uncertainty on the angular correlation coefficent $a$ and on the Fierz interference term $b$, in a pure Fermi transition. In this case, both parameters are directly sensitive to the possible contribution of exotic scalar currents.
DOI: https://doi.org/10.22323/1.380.0449
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