Nuclear Physics & RIKEN Theory Seminar

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

Presented by Ian Balitsky, JLab/ODU

Friday, January 29, 2021, 10:00 am — Videoconference / Virtual Event (see link below)

Abstract: The Drell-Yan hadronic tensor for electromagnetic (EM) current is calculated in the Sudakov region s»Q2»q2⊥ with 1Q2 accuracy, first at the tree level and then with the double-log accuracy. It is demonstrated that in the leading order in Nc 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: f1 responsible for total DY cross section, and Boer-Mulders function h⊥1. The order-of-magnitude estimates of angular distributions for DY process seem to agree with LHC results at corresponding kinematics.

Hosted by: Yacine Mehtar-Tani

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