A precision determination of the weak mixing angle at low energies (B01)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 514321794

The parity-violating electron scattering (PVES) program at MESA with the P2 spectrometer within this CRC aims at determining the weak charge of the proton at an unprecedented level of precision, improving the existing results by factors of 3 to 4. Due to the fact that the scales in these experiments are in the hadronic energy (MeV - GeV) range, the information obtained in this low-energy measurement is complementary to the ongoing LHC measurements, which are performed at the Z-pole (91 GeV). Both energy scales will deliver different sensitivities for new physics up to around 50 TeV.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1660: Hadrons and Nuclei as Discovery Tools
• Applicant Institution: Johannes Gutenberg-Universität Mainz
• Project Heads: Professor Dr. Kurt Aulenbacher; Professor Dr. Niklaus Berger; Professor Dr. Frank Maas