Experimental setup for Weak Interaction Studies with Radioactive ion-beams WISArD
Langue
en
Article de revue
Ce document a été publié dans
Nucl.Instrum.Meth.A. 2023, vol. 1050, p. 168159
Résumé en anglais
The article describes the commissioning and technical development of the Weak Interaction Studies with <sup loc="pre">32</sup>Ar Decay (WISArD) experiment, installed at the radioactive ion-beam facility ISOLDE/CERN. The ...Lire la suite >
The article describes the commissioning and technical development of the Weak Interaction Studies with <sup loc="pre">32</sup>Ar Decay (WISArD) experiment, installed at the radioactive ion-beam facility ISOLDE/CERN. The experiment aims to extend the present limits on scalar and tensor currents in the weak interaction and hence search for physics beyond the Standard Model. The evaluation of these limits relies on measuring the proton energy in beta-delayed proton emission, sensitive to both the beta-neutrino angular correlation coefficient <math display="inline" id="d1e1139" altimg="si1.svg"><msub><mrow><mi>a</mi></mrow><mrow><mi>β</mi><mi>ν</mi></mrow></msub></math> and the Fierz interference term <math display="inline" id="d1e1151" altimg="si2.svg"><mi>b</mi></math>. The method tries to improve previous studies by considering the positron-proton coincidences when determining the kinematic shift in the energy of the emitted protons. Using this coincidence technique, the <math display="inline" id="d1e1156" altimg="si1.svg"><msub><mrow><mi>a</mi></mrow><mrow><mi>β</mi><mi>ν</mi></mrow></msub></math> and <math display="inline" id="d1e1169" altimg="si2.svg"><mi>b</mi></math> coefficients will be measured at the per mil level. Simulations were employed to optimize the ion beam transport efficiency and validate proof-of-principle results obtained in November 2018 (Nov2018). Upgrades are ongoing, and we are looking into improvements to the overall performance of the setup.< Réduire
Mots clés en anglais
Weak interaction
Radioactive ion-beams
Geant4
SIMION
p, energy
beam transport, efficiency
energy, emission
weak interaction
new physics
upgrade
CERN Lab
interference
angular correlation
ion
radioactivity
kinematics
performance
Origine
Importé de halUnités de recherche