In light-front holographic QCD the nucleon gravitational form factor B_N(t) vanishes exactly in the symmetric limit due to an antisymmetric longitudinal factor and remains strongly suppressed for realistic nucleon wave functions, explaining its observed smallness.
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A holographic model with effective linear confinement and gluon condensation simultaneously reproduces the pion mass spectrum and form factors in reasonable agreement with experiment and lattice QCD.
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Origin of the nucleon gravitational form factor $B_N(t)$: Exposition in light-front holographic QCD
In light-front holographic QCD the nucleon gravitational form factor B_N(t) vanishes exactly in the symmetric limit due to an antisymmetric longitudinal factor and remains strongly suppressed for realistic nucleon wave functions, explaining its observed smallness.
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Pion structure in Holographic QCD
A holographic model with effective linear confinement and gluon condensation simultaneously reproduces the pion mass spectrum and form factors in reasonable agreement with experiment and lattice QCD.