Axial Anomaly and the Nucleon Spin

Details Axial Anomaly and the Nucleon Spin Axial Anomaly and the Nucleon Spin

1995-10-18

arxiv.org/abs/hep-ph/9510332v2

Mod.Phys.Lett. A11 (1996) 931-938

Physics

High Energy Physics

High Energy Physics - Phenomenology

(1) A few changes and corrections made following Referee. (2) The difference between quark content of the proton (\Delta\Sigma

Scientific paper

10.1142/S0217732396000941

In this letter, we have taken a particular Lagrangian, which was introduced to resolve U(1) problem, as an effective QCD Lagrangian, and have derived a formula of the quark content of the nucleon spin. The difference between quark content of the proton (\Delta\Sigma_p) and that of the neutron (\Delta\Sigma_n) is evaluated by this formula. Neglecting the higher-order isospin corrections, this formula can reduce to Efremov's results in the large N_c limit.

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