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Probing Quark Distribution Amplitudes Through Generalized Parton Distributions at Large Momentum Transfer
Pervez Hoodbhoy, Xiangdong Ji, Feng Yuan
In the large momentum transfer limit, generalized parton distributions can be calculated through a QCD factorization theorem which involves perturbatively-calculable hard kernels a…
Delta-to-N-gamma Coulomb Quadrupole Amplitude in PQCD
Ahmad Idilbi, Xiangdong Ji, Jian-Ping Ma
We present a leading-order pQCD calculation of the helicity-flip matrix element (Coulomb quadrupole amplitude ), taking into account the transverse momenta of…
Classification and Asymptotic Scaling of Hadron Light-Cone Wave-Function Amplitudes
Xiangdong Ji, Jian-Ping Ma, Feng Yuan
We classify the hadron light-cone wave-function amplitudes in terms of parton helicity, orbital angular momentum, and quark flavor and color symmetries. We show in detail how this…
Viewing the Proton Through "Color"-Filters
Xiangdong Ji
While the form factors and parton distributions provide separately the shape of the proton in coordinate and momentum spaces, a more powerful imaging of the proton structure can be…
Counting Rule for Hadronic Light-Cone Wave Functions
Xiangdong Ji, Jian-Ping Ma, Feng Yuan
We introduce a systematic way to write down the Fock components of a hadronic light-cone wave function with partons and orbital angular momentum projection . We show that…