Measurements of the elastic electromagnetic form factor ratioμpGEp/GMpvia polarization transfer

O Gayou,L Morand,S Churchwell,F Garibaldi,S Frullani,M Kuss,D Dutta,M Amarian,K Aniol,D Crovelli,C Glashausser,V Punjabi,X Jiang,K Mccormick,E Chudakov,S Malov,G M Huber,S Strauch,B Wojtsekhowski,J P Chen,C W De Jager,R Michaels,J Lerose,G Kumbartzki,D J Margaziotis,K Benslama,K Wijesooriya,L Todor,C F Perdrisat,J Mitchell,V Gorbenko,G M Urciuoli,R Pomatsalyuk,R J Holt,P Markowitz,D Meekins,Z Chai,A Saha,M Liang,R Suleiman,A Afanasev,N Liyanage,L Bimbot,R D Ransome,R Lindgren,E Kinney,S Dumalski,P Bosted,S Choi,J Gao,M Rvachev,R Gilman,P E Ulmer,Z E Meziani ,B D Fox ,Saïda Ben Becher ,R Roché ,C E Jones ,E J Brash ,Feng Xiong ,Sonja Dieterich ,J R Calarco ,J Gómez ,James Kelly ,Chang Cc ,Gao H ,Edgar E Kooijman ,A J Sarty ,M Jones ,O Hansén ,Jordan L Hovdebo ,E Schulte ,M B Epstein ,Daniel T Simon ,Kevin Fissum ,A Glamazdin ,T H Chang ,Wei-Jiang Xü

doi:10.1103/physrevc.64.038202

Measurements of the elastic electromagnetic form factor ratioμpGEp/GMpvia polarization transfer

O Gayou, L Morand + Show 76 more

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https://doi.org/10.1103/physrevc.64.038202

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Journal: Physical review. C	Publication Date: Aug 21, 2001
Citations: 239

Affiliation: Rutgers, The State University of New Jersey, Duke University, Thomas Jefferson National Accelerator Facility, California State University Los Angeles, University of Regina, Old Dominion University, William & Mary, Kharkiv Institute of Physics and Technology, Argonne National Laboratory, Massachusetts Institute of Technology, University of Paris-Sud

#Ratio Of Electromagnetic Form Factors #Form Factors + Show 8 more

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Abstract

We present measurements of the ratio of the proton elastic electromagnetic form factors, μ_pG_(Ep)/G_(Mp). The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine the longitudinal and transverse components of the recoil proton polarization in ep elastic scattering; the ratio of these polarization components is proportional to the ratio of the two form factors. These data reproduce the observation of Jones et al. [Phys. Rev. Lett. 84, 1398 (2000)], that the form factor ratio decreases significantly from unity above Q^2=1 GeV^2.

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