The weak charge of the proton ((02) P02)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: from 2012 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 204404729

The goal of the project is the installation of the P2 experiment at the new MESA accelerator for a measurement of the weak mixing angle at small energies in elastic electron scattering with an accuracy of Delta sin2θw=0.00037 (relative uncertainty 0.16%), comparable with the most precise measurements at LEP and with future measurements at the LHC. This is achieved by the determination of the weak charge of the proton by a measurement of the parity violating asymmetry in elastic scattering of polarised electrons off unpolarised protons.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1044: The Low-Energy Frontier of the Standard Model: From Quarks and Gluons to Hadrons and Nuclei
• International Connection: USA
• Applicant Institution: Johannes Gutenberg-Universität Mainz
• Co-Applicant Institution: GSI Helmholtzzentrum für Schwerionenforschung GmbH; Helmholtz-Institut Mainz; Stony Brook University
• Project Heads: Professor Dr. Kurt Aulenbacher; Professor Dr. Niklaus Berger; Professor Dr. Krishna Kumar; Professor Dr. Frank Maas; Professor Dr. Hubert Spiesberger