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arXiv · 2109.09771

Transverse momentum dependent operator expansion at next-to-leading power

Alexey Vladimirov·Valentin Moos·Ignazio Scimemi
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Abstract

We develop a method of transverse momentum dependent (TMD) operator expansion that yields the TMD factorization theorem on the operator level. The TMD operators are systematically ordered with respect to TMD-twist, which allows a certain separation of kinematic and genuine power corrections. The process dependence enters via the boundary conditions for the background fields. As a proof of principle, we derive the TMD factorization up to the next-to-leading power $(\sim q_T/Q)$ at the next-to-leading order for any process with two detected states.

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Alexey Vladimirov, Valentin Moos, Ignazio Scimemi. 2021-09-20. Transverse momentum dependent operator expansion at next-to-leading power. https://doi.org/10.1007/jhep01(2022)110

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