Introduction to the Transverse-Momentum-Weighted Technique in the Twist-3 Collinear Factorization Approach

Hongxi Xing, Shinsuke Yoshida, Alexey Prokudin

Research output: Contribution to journalReview article

Abstract

The twist-3 collinear factorization framework has drawn much attention in recent decades as a successful approach in describing the data for single spin asymmetries (SSAs). Many SSAs data have been experimentally accumulated in a variety of energies since the first measurement was done in the late 1970s and it is expected that the future experiments like Electron-Ion-Collider will provide us with more data. In order to perform a consistent and precise description of the data taken in different kinematic regimes, the scale evolution of the collinear twist-3 functions and the perturbative higher-order hard part coefficients are mandatory. In this paper, we introduce the techniques for next-to-leading order (NLO) calculation of transverse-momentum-weighted SSAs, which can be served as a useful tool to derive the QCD evolution equation for twist-3 functions and to verify the QCD collinear factorization for twist-3 observables at NLO, as well as obtain the finite NLO hard part coefficients.

Original languageEnglish (US)
Article number4825790
JournalAdvances in High Energy Physics
Volume2019
DOIs
StatePublished - Jan 1 2019

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factorization
transverse momentum
asymmetry
quantum chromodynamics
coefficients
kinematics
ions
electrons
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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title = "Introduction to the Transverse-Momentum-Weighted Technique in the Twist-3 Collinear Factorization Approach",
abstract = "The twist-3 collinear factorization framework has drawn much attention in recent decades as a successful approach in describing the data for single spin asymmetries (SSAs). Many SSAs data have been experimentally accumulated in a variety of energies since the first measurement was done in the late 1970s and it is expected that the future experiments like Electron-Ion-Collider will provide us with more data. In order to perform a consistent and precise description of the data taken in different kinematic regimes, the scale evolution of the collinear twist-3 functions and the perturbative higher-order hard part coefficients are mandatory. In this paper, we introduce the techniques for next-to-leading order (NLO) calculation of transverse-momentum-weighted SSAs, which can be served as a useful tool to derive the QCD evolution equation for twist-3 functions and to verify the QCD collinear factorization for twist-3 observables at NLO, as well as obtain the finite NLO hard part coefficients.",
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Introduction to the Transverse-Momentum-Weighted Technique in the Twist-3 Collinear Factorization Approach. / Xing, Hongxi; Yoshida, Shinsuke; Prokudin, Alexey.

In: Advances in High Energy Physics, Vol. 2019, 4825790, 01.01.2019.

Research output: Contribution to journalReview article

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