Measurement of the weak charge of the carbon-12 nucleus within the P2 experiment in Mainz

Gerz, K.; Becker, D.; Baunack, S.; Kumar, K. S.; Maas, F. E.
November 2013
AIP Conference Proceedings;Nov2013, Vol. 1563 Issue 1, p86
Academic Journal
The P2 experiment at the MESA facility in Mainz aims to make a high precision measurement of the weak charge of the proton, and a suitable experimental setup is currently being designed [1]. As high precision measurements of the weak charges of different particles and nuclei are differently sensitive to physics beyond the Standard Model in the form of new quantum loop correction parameters, experiments with a range of different target materials are complementary. We introduce first feasibility considerations for the determination of the Weak Mixing Angle via the scattering of electrons from carbon nuclei in a graphite target with the P2 detector setup. In order to make an estimate of the achievable precision we present analytic calculations as well as Monte-Carlo simulations. The results of Geant4 simulations of proposed experimental setups are included.


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