Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.42: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

The front-end signal path of the P2 experiment at MESA — Sebastian Baunack¹, Maarten Bonekamp², Boris Gläser¹, •Rahima Krini¹, Frank Maas^1,3,4, Moran Neher¹, David R. Pineiro³, Tobias Rimke¹, and Malte Wilfert¹ for the P2 collaboration — ¹Institute for Nuclear Physics, Mainz, Germany — ²IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France — ³Helmholtz Institute Mainz, Germany — ⁴PRISMA+ Cluster of Excellence, Johannes Gutenberg-Universität Mainz

The Mainz Energy recovering Superconducting Accelerator (MESA) is being built at the Institute for Nuclear Physics in Mainz. At MESA the P2 experiment is planned for a precision measurement of the weak mixing angle. The weak mixing angle sin²θ_W can be measured in parity violating elastic electron-proton scattering. The aim of the P2 experiment is to measure the weak mixing angle with an accuracy of 0.15% at a low four-momentum transfer of Q²=4.5·10⁻³GeV².
The small asymmetries O(10⁻⁸) and the high precision require very high statistics. Therefore an integrating measurement with the associated integrating data acquisition readout chain is needed. A joint read-out electronics for P2 experiment in Mainz and for Moeller experiment at the Jefferson Laboratory is in development by collaborators of University of Manitoba. The latest prototype of a full differential integrating detector signal chain was built and tested at MAMI (Mainzer Mikrotron). The results fulfill the requirements of the P2 parity violation experiment and will be presented in this conference.

Keywords: parity violation; weak mixing angle; read-out electronics; MESA; P2