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Measurement of GEp/GMp via polarization transfer at Q2 = 0.4 GeV /c2 |
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| Authors: | Th. Pospischil P. Bartsch D. Baumann R. Böhm K. Bohinc M. Ding S. Derber M.O. Distler D. Elsner I. Ewald J. Friedrich J.M. Friedrich S. Grözinger S. Hedicke P. Jennewein J. Jourdan M. Kahrau F. Klein K.W. Krygier J. Lac A. Liesenfeld S. Malov J. McIntyre H. Merkel P. Merle U. Müller R. Neuhausen M. Potokar R.D. Ransome D. Rohe G. Rosner J. Sanner H. Schmieden M. Seimetz S. Širca I. Sick O. Strähle A. Süle A. Wagner Th. Walcher M. Weis |
| Affiliation: | A1 Collaboration, Institut für Kernphysik, Universit?t Mainz, D-55099 Mainz, Germany, DE Departement für Physik und Astronomie, Universit?t Basel, CH-4056 Basel, Switzerland, CH Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA, US Institut Jo?ef Stefan, University of Ljubljana, SI-1001 Ljubljana, Slovenia, SI Institut für Physik, Universit?t Mainz, D-55099 Mainz, Germany, DE |
| Abstract: | The polarization transfer from longitudinally polarized electrons to protons in the elastic scattering p( e, e' p) has been measured around Q2 = 0.4 (GeV/c)2 with the three-spectrometer facility at the Mainz microtron MAMI. From this polarization transfer the ratio G Ep/(G Mp/μp) has been determined. The ratio is found to be slightly less than unity in agreement with recent results from other laboratories and from the Rosenbluth separation of cross-sections measured with unpolarized electrons. Received: 26 July 2001 / Accepted: 25 September 2001 |
| Keywords: | PACS. 25.30.Bf Elastic electron scattering – 13.40.Gp Electromagnetic form factors – 14.20.Dh Protons and neutrons – 24.70.+s Polarization phenomena in reactions |
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