The Emc Spin Crisis: Comparing Proton and Photon

1993/03/07 by O. V. Teryaev, Teryaev, O. V.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9303228

8 pages (2 figures included into the text), LATEX, the updated contribution to XI High Energy Physics Seminar, Dubna, September 1992

arxiv created 1993/03/07 · arxiv updated 2009/11/30

Abstract

The "kinematical" resolution of the U_A(1) problem is proposed. The cancellation of photonic and gluonic anomalies suggested by the t'Hooft consistency principle naturally explains the zero singlet contributions to the first moments of proton and photon spin structure functions. The new sum rule for the photon spin structure function is derived. The strong strong Q²-dependence of the Gerasimov-Drell-Hearn sum rule is related to the G₂ structure function and to the gluonic anomaly.

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