Speaker
Samuel Webb
(University of Manchester (GB))
Description
The $\phi_{\eta}^{\star}$ angle of Drell-Yan di-lepton pairs probes initial state gluon radiation and its definition relies only upon the well-measured lepton directions. The $\phi_{\eta}^{\star}$ distribution is sensitive to similar but complementary physics to the intermediate boson transverse momentum distribution. A measurement of the normalised $\phi_{\eta}^{\star}$ differential cross section around the Z-pole was made using the ATLAS detector at 7 TeV. In this talk progress towards an updated measurement using the full 8 TeV dataset is presented.
Author
Samuel Webb
(University of Manchester (GB))
