Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 10: Precision Tests of the Standard Model 1

HK 10.3: Talk

Monday, March 23, 2015, 18:00–18:15, K/HS1

Detector studies for a high precision determination of the weak mixing angle at the future P2-experiment in Mainz — •Kathrin Gerz¹, Sebastian Baunack¹, Dominik Becker¹, Jürgen Diefenbach¹, Boris Gläser¹, Yoshio Imai¹, Thomas Jennewein¹, Frank Maas^1,2,3, and David Rodriguez² for the A4 collaboration — ¹Institut für Kernphysik, Johannes-Gutenberg-Universität Mainz — ²Helmholz-Institut Mainz — ³PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, 55099 Mainz

The P2 experiment at the upcoming MESA accelerator in Mainz aims for a high precision determination of the electroweak mixing angle:

The 2% measurement of the parity violating asymmetry in elastic electron-proton scattering will allow for a determination of sin²(θ_W) of 0.15%. The experimental setup is currently being designed and will employ the use of an integrating, large solid angle magnetic solenoid spectrometer with quartz bars for the detection of elastically scattered electrons.

The low-energy and high-statistics experiment places high demands on detector performance and radiation hardness of all materials used in the setup.

We are going to present the current status of the development of the experiment, feasibility calculations and simulations. We will put an emphasis on technology and design of a Cherenkov detector.