Understand
We use the energy-momentum tensor (EMT) current to compute the EMT form factors of the nucleon in the framework of the light cone QCD sum rule formalism.
- In the calculations, we employ the most general form of the nucleon's interpolating field and use the distribution amplitudes (DAs) of the nucleon with two sets of the numerical values of the main input parameters entering the expressions of the DAs.
- The directly obtained results from the sum rules for the form factors are reliable at $ Q^2\geq1~GeV^2 $: To extrapolate the results to include the zero momentum transfer squared with the aim of estimation of the related static physical quantities, we use some fit functions for the form factors.
- The numerical computations show that the energy-momentum tensor form factors of the nucleon can be well fitted to the multipole fit form.