The chirally-odd twist-3 distribution e(x)

Details The chirally-odd twist-3 distribution e(x) The chirally-odd twist-3 distribution e(x)

2002-12-03

arxiv.org/abs/hep-ph/0212044v2

JHEP 0308 (2003) 006

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 3 figures, new references and figures added

Scientific paper

10.1088/1126-6708/2003/08/006

Properties of the nucleon twist-3 distribution function e(x) are reviewed. It is emphasized that the QCD equations of motion imply the existence of a delta-function at x=0 in e(x), which gives rise to the pion-nucleon sigma-term. According to the resulting ``practical'' DIS sum rules the first and the second moment of e(x) vanish, a situation analogue to that of the pure twist-3 distribution function $\bar{g}_2(x)$.

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