XXVIII International Workshop on Deep-Inelastic Scattering and Related Subjects

Gauge-invariant TMD factorization for Drell-Yan hadronic tensor at small x

Not scheduled

20m

Virtual (Stony Brook, NY)

Recorded Flash Talk Structure Functions and Parton Densities Recorded Flash Talk

Speaker

Ian Balitsky (JLab/ODU)

Description

The Drell-Yan hadronic tensor for electromagnetic (EM) current in the Sudakov region $s\gg Q^2\gg q_{\perp }^2$ is obtained
with $\frac{1}{Q^2}$ accuracy.
In the leading order in $N_c$ the higher-twist quark-quark-gluon TMDs reduce to
leading-twist TMDs due to QCD equation of motion. The resulting tensor for unpolarized hadrons is
EM gauge-invariant and depends on two leading-twist TMDs: $f_1$ responsible for total DY cross section,
and Boer-Mulders function $h_1^{\perp }$. The order-of-magnitude estimates of angular distributions for
DY process seem to agree with LHC results at corresponding kinematics.

Presentation materials

balitsky.mp4

Youtube Link