Perturbative Calculations of Gravitational Form Factors at Large Momentum Transfer

Abstract

We perform a perturbative QCD analysis of the gravitational form factors (GFFs) of nucleon at large momentum transfer. We derive the explicit factorization formula of the GFFs in terms of twist-3 and twist-4 light-cone distribution amplitudes of nucleon. Power behaviors for these GFFs are obtained from the leading order calculations. Numeric results of the quark and gluon contributions to various GFFs are presented with model assumptions for the distribution amplitudes in the literature. We also present the perturbative calculations of the scalar form factor $⟨P^{\prime }|F^2|P⟩$ for pion and proton at large momentum transfer.

arXiv comment22 pages, 8 figures

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