Threshold Pion Production at Large Momentum Transfers

TL;DR

This paper investigates threshold pion electroproduction on protons at high photon virtualities (1-10 GeV^2) using light-cone sum rules to calculate the S-wave multipoles at threshold.

Contribution

It introduces a novel application of light-cone sum rules to compute threshold S-wave multipoles at large momentum transfers.

Findings

Calculated $E_{0+}$ and $L_{0+}$ multipoles in the 1-10 GeV^2 range.

Provides theoretical predictions for threshold pion electroproduction at high energies.

Enhances understanding of QCD dynamics in pion production processes.

Abstract

We consider threshold pion electroproduction on a proton target for photon virtualities in the region 1-10 GeV$^2$. The S-wave multipoles at threshold, $E_{0+}$ and $L_{0+}$, are calculated using light-cone sum rules.