The ratio of e±p scattering cross sections predicted from the global fit of elastic ep data

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Published 5 October 2009 2009 IOP Publishing Ltd
, , Citation W M Alberico et al 2009 J. Phys. G: Nucl. Part. Phys. 36 115009 DOI 10.1088/0954-3899/36/11/115009

0954-3899/36/11/115009

Abstract

We present predictions for the value of the cross section ratio σ(e+pe+p)/σ(epep), determined from our fit of the elastic ep cross section and polarization data. In this fit, we took into account the phenomenological two-photon exchange dispersive correction. The cross section ratios which are expected to be measured by the VEPP-3 experiment are computed. The kinematical region which will be covered by the E04-116 JLab experiment is also considered. It is shown that for both experiments the predicted cross section ratios deviate from unity by more than 3σ.

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10.1088/0954-3899/36/11/115009