e1-6a run CLAS data

Spokespersons

P. Khetarpal, P. Stoler, I. Aznauryan, V. Kubarovsky,

Year

2012

Abstract

We report the measurement of near threshold neutral pion electroproduction cross sections on the proton in the kinematic range $Q^2$ from 2 to 4.5 GeV$^2$ and $W$ from 1.08 to 1.16 GeV.

Comment

These measurements allow us to access the dominant pion-nucleon s-wave multipoles $E_{0+}$ and $S_{0+}$ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors $G_1^{\pi^0 p}(Q^2)$ and $G_2^{\pi^0 p}(Q^2)$.

Publication

1. P. Khetarpal, P. Stoler, I. Aznauryan, V. Kubarovsky Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors // Phys. Rev. C 87, 045205 (2013); http://arxiv.org/abs/1211.6460

Quantities

d²σ/dcos(θ_π)dφ_π

Measurements