Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 8: Fundamental Symmetries I

HK 8.4: Vortrag

Montag, 30. März 2020, 17:30–17:45, J-HS B

Investigation of helicity correlated false asymmetries at the P2 experimentSebastian Baunack1, Dominik Becker1, Kathrin Imai1, Rahima Krini1, Frank Maas1,2,3, David Rodriguez Pineiro2, and •Malte Wilfert1 for the P2 collaboration — 1Institut für Kernphysik, Johannes Gutenberg-Universität Mainz — 2Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz — 3PRISMA Cluster of Excellence, Johannes Gutenberg-Universität Mainz

The weak mixing angle sin2θW can be measured in parity violating elastic electron-proton scattering. The aim of the P2 experiment is a very precise measurement of the weak mixing angle with a precision of 0.15% at a low four-momentum transfer of Q2 = 4.5· 10−3 GeV2. This precision is comparable to existing measurements at the Z pole. The experiment will be built at the future MESA accelerator in Mainz.

The achievable precision in the measurement of the parity violating asymmetry depends not only on the statistical uncertainty, it also depends on various systematic effects. One of them are helicity correlated differences in beam parameters like energy, position and angle. The false asymmetry induced by such fluctuations is described in this talk.

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