Publications
Publication Information
| Title | Drell-Yan angular lepton distributions at small $x$ from TMD factorization |
| Authors | Ian Balitsky |
| JLAB number | JLAB-THY-21-3407 |
| LANL number | arXiv:2105.13391 |
| Other number | DOE/OR/23177-5225 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Journal of High Energy Physics Volume 09 Page(s) 022 Refereed | |
| Publication Abstract: | The Drell-Yan process is studied in the framework of TMD factorization in the Sudakov region $s\gg Q^2\gg q_\perp^2$ corresponding to recent LHC experiments with $Q^2$ of order of mass of Z-boson and transverse momentum of DY pair $\sim$ few tens GeV. The DY hadronic tensors are expressed in terms of quark and quark-gluon TMDs with ${1\over Q^2}$ and ${1\over N_c^2}$ 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 hadronic tensors depend 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 on five angular coefficients $A_0-A_4$ of DY pair production. The remaining three coefficients $A_5-A_7$ are determined by quark-quark-gluon TMDs multiplied by extra ${1\over N_c}$ so they appear to be relatively small in accordance with LHC results. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1007/JHEP09(2021)022 |
| Accepted Manuscript: | Balitsky2021_Article_Drell-YanAngularLeptonDistribu.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |