Scalar form-factor of the proton with light-cone QCD sum rules

Details Scalar form-factor of the proton with light-cone QCD sum rules Scalar form-factor of the proton with light-cone QCD sum rules

2006-01-04

arxiv.org/abs/hep-ph/0601025v2

Phys.Rev. D73 (2006) 094011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures, revised version

Scientific paper

10.1103/PhysRevD.73.094011

In this article, we calculate the scalar form-factor of the proton in the framework of the light-cone QCD sum rules approach with the three valence quark light-cone distribution amplitudes up to twist-6, and observe the scalar form-factor $\sigma(t=-Q^2)$ at intermediate and large momentum transfers $Q^2> 2GeV^2$ has significant contributions from the end-point (or soft) terms. The numerical values for the $\sigma(t=-Q^2)$ are compatible with the calculations from the chiral quark model and lattice QCD at the region $Q^2>2GeV^2$.

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