Physics Letters B (Jun 2017)

Polarization-transfer measurement to a large-virtuality bound proton in the deuteron

  • I. Yaron,
  • D. Izraeli,
  • P. Achenbach,
  • H. Arenhövel,
  • J. Beričič,
  • R. Böhm,
  • D. Bosnar,
  • E.O. Cohen,
  • L. Debenjak,
  • M.O. Distler,
  • A. Esser,
  • I. Friščić,
  • R. Gilman,
  • I. Korover,
  • J. Lichtenstadt,
  • H. Merkel,
  • D.G. Middleton,
  • M. Mihovilovič,
  • U. Müller,
  • E. Piasetzky,
  • J. Pochodzalla,
  • G. Ron,
  • B.S. Schlimme,
  • M. Schoth,
  • F. Schulz,
  • C. Sfienti,
  • S. Širca,
  • S. Strauch,
  • M. Thiel,
  • A. Tyukin,
  • A. Weber

DOI
https://doi.org/10.1016/j.physletb.2017.01.034
Journal volume & issue
Vol. 769, no. C
pp. 21 – 24

Abstract

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We report the measurement of the ratio of polarization-transfer components, Px/Pz, in the H2(e→,e′p→)n reaction at low and high missing momenta, in search of differences between free and bound protons. The observed deviation of Px/Pz from that of a free proton, which is similar to that observed in 4He, indicates that the effect in nuclei is a function of the virtuality of the knock-out proton and the missing momentum direction, but not the average nuclear density. There is a general agreement between the data and calculations, which assume free proton form factors, however, the measurements are consistently about 10% higher.

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