English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We discuss the twist-three, unpolarized, chiral-odd, transverse momentumdependent parton distribution (TMD) $e^q(x,k_\perp)$ within a light-frontmodel. We review a model-independent decomposition of this TMD, which followsfrom the QCD equations of motion and is given in terms of a leading-twist massterm, a pure interaction-dependent contribution, and singular terms. Theleading-twist and pure twist-three terms are represented in terms of overlap oflight-front wave functions (LFWFs), taking into account the Fock states withthree valence quark ($3q$) and three-quark plus one gluon ($3q+g$). The $3q$and $3q+g$ LFWFs with total orbital angular momentum zero are modeled using aparametrization derived from the conformal expansion of the proton distributionamplitudes, with parameters fitted to reproduce available phenomenologicalinformation on the unpolarized leading-twist quark and gluon collinear partondistributions. Numerical predictions for both the quark TMD $e^q(x,k_\perp)$and the collinear parton distribution $e^q(x)$ are presented, discussing therole of the quark-gluon correlations in the proton.

The twist-three distribution $e^q(x,k_\perp)$ in a light-front model