/ Experiment-HEP arXiv:1005.3419


Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2


Puckett, A.J.R. (MIT) ; Brash, E.J. (Jefferson Lab) ; Jones, M.K. (Jefferson Lab) ; Luo, W. (Lanzhou U.) ; Meziane, M. (William-Mary Coll.) ; Pentchev, L. (William-Mary Coll.) ; Perdrisat, C.F. (William-Mary Coll.) ; Punjabi, V. (Norfolk State U.) ; Wesselmann, F.R. (Norfolk State U.) ; Ahmidouch, A. (North Carolina A-T State U.) ; Albayrak, I. (Hampton U.) ; Aniol, K.A. (Cal State, L.A.) ; Arrington, J. (Argonne) ; Asaturyan, A. (Yerevan Phys. Inst.) ; Baghdasaryan, H. (Virginia U.) ; Benmokhtar, F. (Carnegie Mellon U.) ; Bertozzi, W. (MIT) ; Bimbot, L. (Orsay, LAL) ; Bosted, P. (Jefferson Lab) ; Boeglin, W. (Florida Intl. U.) ; Butuceanu, C. (Regina U.) ; Carter, P. (Christopher Newport U.) ; Chernenko, S. (Dubna, JINR) ; Christy, E. (Hampton U.) ; Commisso, M. (Virginia U.) ; Cornejo, J.C. (Cal State, L.A.) ; Covrig, S. (Jefferson Lab) ; Danagoulian, S. (North Carolina A-T State U.) ; Daniel, A. (Ohio U.) ; Davidenko, A. (Serpukhov, IHEP) ; Day, D. (Virginia U.) ; Dhamija, S. (Florida Intl. U.) ; Dutta, D. (Mississippi State U.) ; Ent, R. (Jefferson Lab) ; Frullani, S. (INFN, Rome) ; Fenker, H. (Jefferson Lab) ; Frlez, E. (Virginia U.) ; Garibaldi, F. (INFN, Rome) ; Gaskell, D. (Jefferson Lab) ; Gilad, S. (MIT) ; Gilman, R. (Rutgers U., Piscataway) ; Goncharenko, Y. (Serpukhov, IHEP) ; Hafidi, K. (Argonne) ; Hamilton, D. (Glasgow U.) ; Higinbotham, D.W. (Jefferson Lab) ; Hinton, W. (Norfolk State U.) ; Horn, T. (Jefferson Lab) ; Hu, B. (Lanzhou U.) ; Huang, J. (MIT) ; Huber, G.M. (Regina U.) ; Jensen, E. (Christopher Newport U.) ; Keppel, C. (Hampton U.) ; Khandaker, M. (Norfolk State U.) ; King, P. (Ohio U.) ; Kirillov, D. (Dubna, JINR) ; Kohl, M. (Hampton U.) ; Kravtsov, V. (Serpukhov, IHEP) ; Kumbartzki, G. (Rutgers U., Piscataway) ; Li, Y. (Hampton U.) ; Mamyan, V. (Virginia U.) ; Margaziotis, D.J. (Cal State, L.A.) ; Marsh, A. (Christopher Newport U.) ; Matulenko, Y. (Serpukhov, IHEP) ; Maxwell, J. (Virginia U.) ; Mbianda, G. (Witwatersrand U.) ; Meekins, D. (Jefferson Lab) ; Melnik, Y. (Serpukhov, IHEP) ; Miller, J. (Maryland U.) ; Mkrtchyan, A. (Yerevan Phys. Inst.) ; Mkrtchyan, H. (Yerevan Phys. Inst.) ; Moffit, B. (MIT) ; Moreno, O. (Cal State, L.A.) ; Mulholland, J. (Virginia U.) ; Narayan, A. (Mississippi State U.) ; Nedev, S. (Chem. Tech. Metal. U., Sofia) ; Nuruzzaman, (Mississippi State U.) ; Piasetzky, E. (Tel Aviv U.) ; Pierce, W. (Christopher Newport U.) ; Piskunov, N.M. (Dubna, JINR) ; Prok, Y. (Christopher Newport U.) ; Ransome, R.D. (Rutgers U., Piscataway) ; Razin, D.S. (Dubna, JINR) ; Reimer, P. (Argonne) ; Reinhold, J. (Florida Intl. U.) ; Rondon, O. (Virginia U.) ; Shabestari, M. (Virginia U.) ; Shahinyan, A. (Yerevan Phys. Inst.) ; Shestermanov, K. (Serpukhov, IHEP) ; Sirca, S. (Ljubljana U.) ; Sitnik, I. (Dubna, JINR) ; Smykov, L. (Dubna, JINR) ; Smith, G. (Jefferson Lab) ; Solovyev, L. (Serpukhov, IHEP) ; Solvignon, P. (Argonne) ; Subedi, R. (Virginia U.) ; Tomasi-Gustafsson, E. (DAPNIA, Saclay) ; Vasiliev, A. (Serpukhov, IHEP) ; Veilleux, M. (Christopher Newport U.) ; Wojtsekhowski, B.B. (Jefferson Lab) ; Wood, S. (Jefferson Lab) ; Ye, Z. (Hampton U.) ; Zanevsky, Y. (Dubna, JINR) ; Zhang, X. (Lanzhou U.) ; Zhang, Y. (Lanzhou U.) ; Zheng, X. (Virginia U.) ; Zhu, L. (MIT)

Published in: Phys.Rev.Lett.
Year: 2010
Vol.: 104
Page No: 242301
Pages: 12

Abstract: Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon's quark constituents/ indeed, recent proton data have attracted intense theoretical interest. In this letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q2=5.2, 6.7, and 8.5 GeV2. By extending the range of Q2 for which GEp is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the non-perturbative regime.

Web-Page: http://dx.doi.org/10.1103/PhysRevLett.104.242301; http://www1.jlab.org/Ul/publications/view_pub.cfm?pub_id=9662; http://inspirebeta.net/record/855220/files/figure1.png; http://inspirebeta.net/record/855220/files/figure2.png; http://inspirebeta.net/record/855220/files/figure3.png

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