Connections between TMD and Collinear Twist-3 Functions within the Context of Single-Spin Asymmetries

Pitonyak Daniel, Gamberg Leonard, Metz Andreas, Prokudin Alexei

Research output: Contribution to journalConference article


We review the theoretical framework underlying the description of transverse single-spin asymmetries (SSAs) for both collinear and transverse-momentum-dependent (TMD) processes. For the latter, we discuss modifications to the widely used CSS formalism that are needed to address certain issues that have arisen in TMD analyses. After these improvements, one can derive rigorous relations between collinear and TMD functions. Moreover, we show how both collinear and TMD SSA observables are driven by multi-parton correlations, which allows for a future global extraction to be performed including data from both types of measurements.

Original languageEnglish (US)
JournalProceedings of Science
Publication statusPublished - Jan 1 2017
Event2017 QCD Evolution, QCDEV 2017 - Newport News, United States
Duration: May 22 2017May 26 2017


All Science Journal Classification (ASJC) codes

  • General

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