Proton Radius in High-Energy Muon Scattering

Apr 9, 2019, 3:00 PM
20m
Cavallerizza Reale - Aula Magna

Cavallerizza Reale - Aula Magna

Via Verdi 9, Turin
Parallel Session Talk WG7: Future of DIS WG7: Future of DIS

Speaker

Mr Christian Dreisbach (Technische Universitaet Muenchen (DE))

Description

The proton radius can be determined by measuring the slope of the electric form factor at small squared four-momentum transfer $Q^2$. Numerous elastic-scattering and laser-spectroscopy measurements of the proton radius have been performed with contradicting results, the so-called proton radius puzzle. We propose to measure the proton radius in high-energy elastic muon-proton scattering at the M2 beam line of CERN's Super Proton Synchrotron in the year 2022. A high precision measurement at low $Q^2$ realized with a high-pressure hydrogen TPC can contribute to a solution of the puzzle, especially in view of the systematics of this approach compared to electron scattering. In the year 2018, a test measurement with silicon tracking detectors upstream and downstream of a prototype TPC was performed to study the feasibility employing both detector systems. We present results of the on-going analysis and discuss ideas for a possible setup in 2022.

Primary authors

Mr Alexander Inglessi (Petersburg Nuclear Physics Institute (PNPI)) Mr Benjamin Veit (Universität Mainz, Institut für Kernphysik) Prof. Bernhard Ketzer (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik) Mr Christian Dreisbach (Technische Universitaet Muenchen (DE)) Eva-Maria Kabuss (Johannes Gutenberg Universitaet Mainz (DE)) Jan Michael Friedrich (Technische Universitaet Muenchen (DE)) Martin Kurt Hoffmann (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik) Dr Oleg Kiselev (GSI Darmstadt) Dr Sebastian Uhl (Technische Universitaet Muenchen (DE)) Prof. Stephan Paul (Technische Universitaet Muenchen (DE))

Presentation materials