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The Mainz high-precision proton form factor measurement

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

New precise results from 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 Q2 = 1(GeV/c)2 with statistical errors below 0.2%. The electric and magnetic form factors of the proton were extracted with 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 〈rE212=0.879(5)stat.(4)syst.(2)model(4) group fm and 〈rM212=0. 777(13)stat.(9)syst.(5)model(2) group fm. Extending the data set with external data, a continuous, simultaneous fit to the world data set up to Q2 = 10(GeV/c) 2 is achieved.

Original languageEnglish
Title of host publication11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012
Pages549-553
Number of pages5
DOIs
StatePublished - 2013
Event11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012 - St. Petersburg, FL, United States
Duration: May 29 2012Jun 3 2012

Publication series

NameAIP Conference Proceedings
Volume1560
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012
Country/TerritoryUnited States
CitySt. Petersburg, FL
Period05/29/1206/3/12

Keywords

  • proton form factors
  • proton radius

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