Threshold Pion Electroproduction at Large Momentum Transfers

Details Threshold Pion Electroproduction at Large Momentum Transfers Threshold Pion Electroproduction at Large Momentum Transfers

2007-10-17

arxiv.org/abs/0710.3265v1

Phys.Rev.D77:034016,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 11 figures

Scientific paper

10.1103/PhysRevD.77.034016

We consider pion electroproduction close to threshold for $Q^2$ in the region 1-10 GeV$^2$ on a nucleon target. The momentum transfer dependence of the S-wave multipoles at threshold, $E_{0+}$ and $L_{0+}$, is calculated in the chiral limit using light-cone sum rules. Predictions for the cross sections in the threshold region are given taking into account P-wave contributions that, as we argue, are model independent to a large extent. The results are compared with the SLAC E136 data on the structure function $F_2(W,Q^2)$ in the threshold region.

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