Deep inelastic pion electroproduction at threshold

V. M. Braun, D. Yu. Ivanov, A. Lenz, and A. Peters
Phys. Rev. D 75, 014021 – Published 25 January 2007

Abstract

We consider the cross section of the deep inelastic pion electroproduction on a proton target at threshold for Q2 in the region 510GeV2. The corresponding amplitudes are described in terms of two form factors which we calculate using light-cone sum rules to leading order in QCD and including higher twist corrections. Our results suggest a considerable change from a small Q2 region that can be treated in the soft-pion limit using current algebra. In particular, we obtain a π0 to π+ production ratio of order 1/3 and significant nucleon helicity-flip contributions.

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  • Received 5 December 2006

DOI:https://doi.org/10.1103/PhysRevD.75.014021

©2007 American Physical Society

Authors & Affiliations

V. M. Braun1, D. Yu. Ivanov2, A. Lenz1, and A. Peters1

  • 1Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
  • 2Sobolev Institute of Mathematics, 630090 Novosibirsk, Russia

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Vol. 75, Iss. 1 — 1 January 2007

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