Deep Inelastic Pion Electroproduction at Threshold

Abstract

We consider the cross section of the deep inelastic pion electroproduction on a proton target at threshold for Q^2 in the region 5-10 GeV^2. The corresponding amplitudes are described in terms of two form factors which we calculate using light cone sum rules (LCSR) to leading order in QCD and including higher twist corrections. Our results suggest a considerable change from a small Q^2 region that can be treated in the soft pion limit using current algebra. In particular, we obtain a π^0 to π^+ producton ratio of order 1/3 and significant nucleon helicity-flip contributions.

21 pages, 3 figures

References in corpus (1)

• Dipole description of inclusive particle production

Cited by in corpus (4)

• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• Production of a pion in association with a high-Q2 dilepton pair in antiproton-proton annihilation at GSI-FAIR
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• Threshold Pion Electroproduction at Large Momentum Transfers