Transverse Spin / Transverse Momentum Analogy and Gauge Invariance of Deeply Virtual Compton Scattering

Details Transverse Spin / Transverse Momentum Analogy and Gauge Invariance of Deeply Virtual Compton Scattering Transverse Spin / Transverse Momentum Analogy and Gauge Invariance of Deeply Virtual Compton Scattering

1999-04-17

arxiv.org/abs/hep-ph/9904375v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 4 pages; Talk at XIII International Symposium on High Energy Spin Physics (Protvino, September 8-12 1998)

Scientific paper

Using the similarity between twist 3 contributions to transverse spin for usual parton distributions and transverse momentum for non-diagonal parton distributions, we determine for the simple case of a scalar (pion, $He^4$) target the linear in transverse momentum twist-3 contribution to Deeply Virtual Compton amplitude. This allows to write a gauge invariant amplitude for this non-forward process.

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