The T-Wilson Line

Understand

We argue that soft-collinear effective theory, as is currently formulated, lacks an ingredient which is essential for obtaining a gauge invariant definitions of certain non-perturbative matrix elements relevant for semi-inclusive high-energy processes.

• Those processes and the companion cross-sections are to be analyzed and measured at the Large Hadron Collider.
• The missing feature is a gauge link constructed only from the transverse component of the gluon field denoted by the "$T$-Wilson line"'.
• It is neither soft nor collinear.