title: JLab measurement of the 4He charge form factor at large momentum transfers.
abstract: The charge form factor of 4He has been extracted in the range 29  fm(-2) ≤ Q2 ≤ 77  fm(-2) from elastic electron scattering, detecting 4He recoil nuclei and electrons in coincidence with the high resolution spectrometers of the Hall A Facility of Jefferson Lab. The measurements have uncovered a second diffraction minimum for the form factor, which was predicted in the Q2 range of this experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the few-body problem.
authors.affiliation: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
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authors.affiliation: Kent State University, Kent, Ohio 44242, USA and Temple University, Philadelphia, Pennsylvania 19122, USA.
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authors.affiliation: Seoul National University, Seoul 151-747, Korea.
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authors.affiliation: Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy and Istituto Superiore di Sanitá, 00161 Rome, Italy.
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authors.affiliation: Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy and Istituto Superiore di Sanitá, 00161 Rome, Italy.
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authors.affiliation: Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
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