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Structure functions; polarization; sum rules; quantum chromodynamics

We analyze the various inputs that go into computing the recently measured first moment of the proton spin structure functiong₁^p(x). The basic inputs are the various valence and sea quark polarisations and the gluonic contribution coming through axial anomaly. We show that the quark model predictions for valence quark polarisations, suitably modified to accommodate Bjorken sum rule, are consistent with measured value of moment of the spin structure function.

MVN Murthy¹ V Ravindran¹

1. The Institute of Mathematical Sciences, Madras - 600 113, India

Published

February 1990

Manuscript received

8 August 1989