Erlangen 2026 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 8: Instrumentation I

HK 8.4: Vortrag

Montag, 16. März 2026, 17:15–17:30, PHIL A 301

Construction of the Cherenkov-Detector for the P2-Experiment — Sebastian Baunack¹, Maarten Boonekamp⁴, Boris Gläser¹, Shruti Gudla¹, •Franz Halter¹, Jayanta Naik¹, Rahima Krini¹, Frank Maas^1,2,3, Moran Neher¹, Tobias Rimke¹, Paul Schöner², Siddharth Takker¹, and Malte Wilfert¹ for the P2 collaboration — ¹Institute of Nuclear Physics, Mainz, Germany — ²Helmholtz-Institut Mainz, Mainz, Germany — ³PRISMA+ Cluster of Excellence, Mainz, Germany — ⁴IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France

The P2 experiment at the MESA accelerator facility in Mainz aims at a precise determination of the weak mixing angle sin²θ_W. The Weinberg angle will be extracted from parity violating asymmetry in elastic electron-proton scattering at low Q². Therefore the measurement verifies a fundamental parameter of the Standard Model and may open a door to new physics with a target relative accuracy of 0.16%.
The key detector element will be a Cherenkov detector ring, in which Cherenkov light is detected by photomultiplier tubes. To ensure an accurate measurement, the detectors must be carefully aligned and shielded.
This talk will present the design challenges, current status, and recent progress of the detector components.

Keywords: P2, MESA, Cherenkov detector