First derivation of Z and W helicity density matrix elements in the color-dipole S-matrix framework, with forward-rapidity predictions at 14 TeV linking the Lam-Tung violation to the UGD tail.
Drell-Yan production and Lam-Tung relation in the Color Glass Condensate formalism
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We study the Drell-Yan production cross section and structure functions in proton (deuteron)-nucleus collisions using the Color Glass Condensate formalism. The nucleus is treated in the Color Glass Condensate framework which includes both higher twist effects due to the inclusion of multiple scatterings and leading twist pQCD shadowing due to the small x resummation, while the proton (or deuteron) is treated within the DGLAP improved parton model. In particular, the Drell-Yan structure functions are used in order to investigate the Lam-Tung relation at small x, which is known to be identically zero at leading twist up to Next-to-Leading order, and is thus a good playground for studying higher twist effects. In agreement with this, we find that violations of this relation are more important for low momentum and invariant mass of the Drell-Yan pair, and also in the region of rapidity that corresponds to smaller values of x in the nucleus.
citation-role summary
background 1
citation-polarity summary
fields
hep-ph 1years
2025 1verdicts
CONDITIONAL 1roles
background 1polarities
unclear 1representative citing papers
citing papers explorer
-
Dilepton angular distributions in the color-dipole $S$-matrix framework
First derivation of Z and W helicity density matrix elements in the color-dipole S-matrix framework, with forward-rapidity predictions at 14 TeV linking the Lam-Tung violation to the UGD tail.