6533b828fe1ef96bd1287978
RESEARCH PRODUCT
High-Precision Determination of the Electric and Magnetic Form Factors of the Proton
M. WeinrieferL. DebenjakM. PotokarB. S. SchlimmeL. NungesserTh. WalcherJ.m. FriedrichD. G. MiddletonJ. PochodzallaP. AchenbachS. ŠIrcaM. O. DistlerMihael MakekR. BöhmDamir BosnarS. Sánchez MajosC. Ayerbe GayosoU. MüllerJ.m. FriedrichHarald MerkelJan C. BernauerM. Gómez Rodríguez De La PazH. FonvieilleLuca DoriaAnselm Essersubject
Particle physicsProtonMesonelastic electron scattering13.40.Gp 14.20.Dh 25.30.BfHadronGeneral Physics and AstronomyFOS: Physical sciencesElementary particle[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciences0103 physical sciencesNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear ExperimentPhysicselastic electron scattering; proton electromagnetic form factors010308 nuclear & particles physicsForm factor (quantum field theory)Charge (physics)NATURAL SCIENCES. Physics.PRIRODNE ZNANOSTI. Fizika.Crystallographyproton electromagnetic form factorsHigh Energy Physics::ExperimentNucleonDimensionless quantitydescription
New precise results of a measurement of the elastic electron-proton scattering cross section performed at the Mainz Microtron MAMI are presented. About 1400 cross sections were measured with negative four-momentum transfers squared up to Q^2=1 (GeV/c)^2 with statistical errors below 0.2%. The electric and magnetic form factors of the proton were extracted by fits of a large variety of form factor models directly to the cross sections. The form factors show some features at the scale of the pion cloud. The charge and magnetic radii are determined to be r_E=0.879(5)(stat.)(4)(syst.)(2)(model)(4)(group) fm and r_M=0.777(13)(stat.)(9)(syst.)(5)(model)(2)(group) fm.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-07-28 |