Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Hadron Structure and Spectroscopy III

HK 16.2: Talk

Tuesday, March 15, 2016, 14:30–14:45, S1/01 A5

Solenoid spectrometer studies for the P2 experiment at MESA — •Dominik Becker¹, Kathrin Gerz¹, Sebastian Baunack¹, Thomas Jennewein¹, Krishna S. Kumar³, Frank E. Maas^1,2, Razvan D. Bucoveanu⁴, and Hubert Spiesberger⁴ for the P2 collaboration — ¹PRISMA Cluster of Excellence and Institute of Nuclear Physics, Johannes Gutenberg University, Mainz, Germany — ²Helmholtz Institue Mainz, Germany — ³Department of Physics and Astronomy, Stony Brook University, Stony Brook, USA — ⁴PRISMA Cluster of Excellence and Institute of Physics, Johannes Gutenberg University, Mainz, Germany

The goal of Project P2 is to determine the electroweak mixing angle sin²(θ_W) to a precision of 0.15 % at low momentum transfer (Q² = 0.004 GeV²/c²). The experiment will be performed at the future MESA accelerator facility in Mainz. The experimental method comprises a measurement of the proton’s weak charge Q_W^p to a relative uncertainty of 1.9 % via the parity violating asymmetry in elastic electron-proton scattering. In the talk, the experimental method as well as the achievable precision in the determination of the electroweak mixing angle will be presented. Furthermore, results of Geant4 simulations which were carried out to study a possible experimental setup will be shown.