The nonperturbative origin of delta-function singularity in the chirally-odd twist-3 distribution function e(x)

Details The nonperturbative origin of delta-function singularity in the chirally-odd twist-3 distribution function e(x) The nonperturbative origin of delta-function singularity in the chirally-odd twist-3 distribution function e(x)

2003-03-03

arxiv.org/abs/hep-ph/0303007v1

Phys.Rev. D67 (2003) 114011

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 eps-figure

Scientific paper

10.1103/PhysRevD.67.114011

We analytically prove that the existence of the delta-function singularity in the chirally-odd twist-3 distribution $e(x)$ of the nucleon is inseparably connected with the nonvanishing quark condensate as a signal of the spontaneous chiral symmetry breaking of the QCD vacuum. This singularity in $e(x)$, which would be observed as a sizable violation of the 1st moment sum rule, is then interpreted as giving a very rare case that the nontrivial vacuum structure of QCD manifests in an observable of a localized QCD excitation, i.e. the nucleon.

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