Precision Rosenbluth Measurement of the Proton Elastic Form Factors

I. A. Qattan(Northwestern University), J. Arrington(Argonne National Laboratory), R. E. Segel(Northwestern University), Xiaochao Zheng(Argonne National Laboratory), K. Aniol(California State University Los Angeles), O. K. Baker(Hampton University), Ryan Beams(Argonne National Laboratory), E. J. Brash(University of Regina), J. R. Calarco(University of New Hampshire), A. Camsonne(Centre National de la Recherche Scientifique), J.-P. Chen(Thomas Jefferson National Accelerator Facility), M. E. Christy(Hampton University), Dipanwita Dutta(Massachusetts Institute of Technology), R. Ent(Thomas Jefferson National Accelerator Facility), S. Frullani(Istituto Nazionale di Fisica Nucleare), D. Gaskell(University of Colorado Boulder), O. Gayou(William & Mary), R. Gilman(Rutgers, The State University of New Jersey), C. Glashausser(Rutgers, The State University of New Jersey), K. Hafidi(Argonne National Laboratory), O. Hansen(Thomas Jefferson National Accelerator Facility), D. W. Higinbotham(Thomas Jefferson National Accelerator Facility), W. Hinton(Old Dominion University), R. J. Holt(Argonne National Laboratory), G. M. Huber(University of Regina), H. Ibrahim(Old Dominion University), L. Jisonna(Northwestern University), M. Jones(Thomas Jefferson National Accelerator Facility), C. Keppel(Hampton University), E. Kinney(University of Colorado Boulder), G. Kumbartzki(Rutgers, The State University of New Jersey), A. Lung(Thomas Jefferson National Accelerator Facility), D. J. Margaziotis(California State University Los Angeles), K. McCormick(Rutgers, The State University of New Jersey), D. Meekins(Thomas Jefferson National Accelerator Facility), R. Michaels(Thomas Jefferson National Accelerator Facility), Peter Monaghan(Massachusetts Institute of Technology), P. Moussiegt(Laboratoire de Physique Subatomique et de Cosmologie), L. Pentchev(Williams (United States)), C. F. Perdrisat(Williams (United States)), V. Punjabi(Norfolk State University), R. D. Ransome(Rutgers, The State University of New Jersey), J. Reinhold(Florida International University), B. Reitz(Thomas Jefferson National Accelerator Facility), A. Saha(Thomas Jefferson National Accelerator Facility), A. Sarty(Saint Mary's University), Eva C. Schulte(Argonne National Laboratory), K. Slifer(Temple University), P. Solvignon(Temple University), V. Sulkosky(William & Mary), K. Wijesooriya(Argonne National Laboratory), B. Zeidman(Argonne National Laboratory)
Physical Review Letters
April 15, 2005
10.1103/physrevlett.94.142301
Cited by 287Open Access
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Abstract

We report the results of a new Rosenbluth measurement of the proton electromagnetic form factors at Q2 values of 2.64, 3.20, and 4.10 GeV2. Cross sections were determined by detecting the recoiling proton, in contrast to previous measurements which detected the scattered electron. Cross sections were determined to 3%, with relative uncertainties below 1%. The ratio mu(p)G(E)/G(M) was determined to 4%-8% and showed mu(p)G(E)/G(M) approximately 1. These results are consistent with, and much more precise than, previous Rosenbluth extractions. They are inconsistent with recent polarization transfer measurements of similar precision, implying a systematic difference between the techniques.

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