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

Abstract

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 $Q^2>2Ge{V}^2$ 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 $Q^2>2Ge{V}^2$.

18 pages, 7 figures, revised version

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Cited by in corpus (14)

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• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• Electroproduction of the $N^{\ast }(1535)$ nucleon resonance in QCD
• Improved analysis on the semi-leptonic decay ${\Lambda }_c\to \Lambda {\ell }^{+}\nu$ from QCD light-cone sum rules
• Deep Inelastic Pion Electroproduction at Threshold
• Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism
• Light Cone QCD Sum Rules Analysis of the Axial N -> Delta Transition Form Factors
• Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules
• Analysis of the $\Sigma -n$ form factors with light-cone QCD sum rules
• Nucleon form factors induced by isovector and isoscalar axial-vector currents in QCD
• Scalar form factor of the nucleon and nucleon--scalar meson coupling constant in QCD
• Analysis of the vector form factors $f_{K\pi }^{+}(Q^2)$ and $f_{K\pi }^{-}(Q^2)$ with light-cone QCD sum rules
• Scalar form factors $f_{\pi \pi }(Q^2)$ and $f_{KK}(Q^2)$ with light-cone QCD sum rules
• Electromagnetic form-factor of the $\pi$ meson with light-cone QCD sum rules