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arXiv · 2203.00267

Energy evolution of T-odd gluon TMDs at small $x$

Daniël Boer·Yoshikazu Hagiwara·Jian Zhou·Ya-jin Zhou
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Abstract

We study the energy or TMD evolution of the three leading twist dipole type T-odd gluon TMDs inside a transversely polarized nucleon, all of which at small $x$ dynamically originate from the spin dependent odderon. Their energy dependence presents a unique opportunity to study the polarization dependent TMD evolution in the small-$x$ region, where the distributions are identical up to a normalization constant at tree level. We further propose to study their evolution via azimuthal asymmetries in virtual photon-jet production in polarized proton-proton collisions at RHIC. We present model predictions for the asymmetries as functions of the large jet or photon transverse momentum and $Q^2$ which set the hard scales in this process.

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Daniël Boer, Yoshikazu Hagiwara, Jian Zhou, Ya-jin Zhou. 2022-03-01. Energy evolution of T-odd gluon TMDs at small $x$. https://doi.org/10.1103/physrevd.105.096017

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