Measurement of the axial and the strangeness magnetic form factor of the proton with a P2 backward angle setup

Journal Article · Thu Nov 07 00:00:00 EST 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4829378· OSTI ID:22280703

Baunack, S.; Becker, D.; Gerz, K. ^[1]; Kumar, K. ^[2]; Maas, F. E. ^[3]

---

1. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, J.J. Becherweg 45, D-55099 Mainz (Germany)
2. University of Massachusetts Amherst, Amherst, Massachusetts 01003 (United States)
3. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, J.J. Becherweg 45, D-55099 Mainz, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt (Germany)

The P2 experiment at the future accelerator facility MESA in Mainz aims for a precise determination of the weak charge of the proton at low momentum transfer. The experimental method is a measurement of the parity violating asymmetry in elastic electron-proton scattering at forward angle. This asymmetry is dominated by the weak charge, but also the proton structure plays a role. Here we consider a back angle measurement, which is more sensitive to the proton structure, and present its possible implications on the main P2 measurement.

• OSTI ID: 22280703
• Journal Information: AIP Conference Proceedings, Vol. 1563, Issue 1; Conference: Workshop to explore physics opportunities with intense, polarized electron beams at 50-300 MeV, Cambridge, MA (United States), 14-16 Mar 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ASYMMETRY
ELECTRON-PROTON INTERACTIONS
FORM FACTORS
FOUR MOMENTUM TRANSFER
PARITY
PARTICLE STRUCTURE
PROTONS
STRANGENESS