Oct 4 – 8, 2021
University of Alcalá
Europe/Madrid timezone

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

Not scheduled
15m
Colegio San Ildefonso (University of Alcalá)

Colegio San Ildefonso

University of Alcalá

Speaker

Ian Balitsky (JLab/ODU)

Description

The Drell-Yan hadronic tensor is calculated in the $s\gg Q^2\gg q_\perp^2$ kinematical region with ${q_\perp^2\over Q^2}$ accuracy, first at the tree level and then with the double-log accuracy. It is demonstrated that 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 corresponding qualitative and semi-quantitative predictions seem to agree with LHC data for Z-boson production at transverse momentum of DY pair $\sim$ few tens GeV.

Primary author

Ian Balitsky (JLab/ODU)

Presentation materials

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