The ratio of proton electromagnetic form factors via recoil polarimetry at Q2=1.13 (GeV/c)2

G Maclachlan, A Aghalaryan,A Ahmidouch,B D Anderson,R Asaturyan,O K Baker,A R Baldwin, D Barkhuff,H Breuer,R Carlini,E Christy, S Churchwell,L J Cole, E Crouse,S Danagoulian,David A Day,T Eden,M Elaasar,R Ent, M Farkhondeh,H Fenker,J M Finn,Lu Gan,K Garrow,Pape Mandoumbe Gueye,Calvin R Howell,Bin Hu,M Jones,James J Kelly,C Keppel, M Khandaker,Won Yong Kim, S Kowalski,A Lai, A Lung,David Mack, R Madey,D M Manley,P Markowitz,Julie C Mitchell,H Mkrtchyan, A K Opper,B Plaster,C F Perdrisat,V Punjabi,B A Raue,T Reichelt,J Reinhold,J F Roche,Yoshinori Sato, N Savvinov,A Yu Semenov,I A Semenova,Woosuk Seo, N Simicevic,G Smith, Sarah F R Taylor,S S Stepanyan, V Tadevosyan,S Tajima,L Tang, W Tireman,P E Ulmer, W Vulcan,J W Watson, S P Wells,F R Wesselmann,S A Wood,Chen Yan,S Yang, Li Yuan,W M Zhang,H Zhu,X Zhu

Nuclear Physics A（2006）

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摘要

Recoil polarimetry was used to extract the ratio of the proton electromagnetic form factors, μpGEp/GMp=0.878±0.064(stat)±0.012(sys), at Q2=1.13(GeV/c)2 from the reaction H1(e→,ep→). This was an ancillary measurement in which the proton polarization was determined as part of a larger program utilizing a stand-alone polarimeter designed to measure μnGEn/GMn. This measurement complements previous recoil polarimetry measurements of μpGEp/GMp made at the Thomas Jefferson National Accelerator Facility.

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关键词

14.20.Dh,13.40.Gp,25.30.Bf,24.70.+s

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