Ground-state charmonia are not simple S- or P-wave states; their distribution amplitudes are nontrivial, with the χ_c0 DA showing balanced positive and negative support due to QCD symmetries, and both states carry a glue momentum fraction 10% below that of the pion.
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2026 2verdicts
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Extends LFWF studies to heavy pseudoscalar quarkonia via a modified non-separable ansatz that reproduces their properties and enables computation of GPDs, electromagnetic and gravitational form factors, and transverse distributions.
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Distribution amplitudes and functions of ground-state scalar and pseudoscalar charmonia
Ground-state charmonia are not simple S- or P-wave states; their distribution amplitudes are nontrivial, with the χ_c0 DA showing balanced positive and negative support due to QCD symmetries, and both states carry a glue momentum fraction 10% below that of the pion.
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Pseudoscalar charmonium and bottomonium: light-front wave functions, distribution amplitudes and distribution functions
Extends LFWF studies to heavy pseudoscalar quarkonia via a modified non-separable ansatz that reproduces their properties and enables computation of GPDs, electromagnetic and gravitational form factors, and transverse distributions.