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Generalized Drell-Hearn-Gerasimov Sum Rule at Order {\cal O}(p^4) in Chiral Perturbation Theory
Xiangdong Ji, Chung-Wen Kao, Jonathan Osborne
We calculate the forward spin-dependent photon-nucleon Compton amplitudes and as functions of photon energy and mass at the next-to-leading ()…
The Nucleon Spin Polarizability at Order ) in Chiral Perturbation Theory
Xiangdong Ji, Chung-Wen Kao, Jonathan Osborne
We calculate the forward spin-dependent photon-nucleon Compton amplitude as a function of photon energy at the next-to-leading () order in chiral perturbation theory…
Generalized Sum Rules for Spin-Dependent Structure Functions of the Nucleon
Xiangdong Ji, Jonathan Osborne
The Drell-Hearn-Gerasimov and Bjorken sum rules are special examples of dispersive sum rules for the spin-dependent structure function G_1(ν, Q^2) at Q^2=0 and \infty. We generaliz…
Simplification of Higher-Twist Evolution in the Large N_c Limit: Why and Why Not
Xiangdong Ji, Jonathan Osborne
Working in the light-cone gauge, we find a simple procedure to calculate the autonomous one-loop Q^2 evolution of the twist-three part of the nucleon g_T(x, Q^2) structure function…