Longitudinal and Transverse Cross Sections in the 1H(e,eK+)Λ Reaction

G. Niculescu et al.
Phys. Rev. Lett. 81, 1805 – Published 31 August 1998
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The 1H(e,eK+)Λ reaction was studied as a function of the squared four-momentum transfer, Q2, and the virtual photon polarization, ɛ. For each of four Q2 settings, 0.52, 0.75, 1.00, and 2.00 (GeV/c)2, the longitudinal and transverse virtual photon cross sections were extracted in measurements at three virtual photon polarizations. The Q2 dependence of the σL/σT ratio differs significantly from current theoretical predictions. This, combined with the precision of the measurement, implies a need for revision of existing calculations.

  • Received 27 March 1998


©1998 American Physical Society

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Vol. 81, Iss. 9 — 31 August 1998

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