Drell-Yan production at small transverse momentum and the collinear anomaly
by
Thomas Becher(University of Bern)
→
Europe/Zurich
TH Theory Conference Room (CERN)
TH Theory Conference Room
CERN
Description
The transverse momentum distribution of lepton pairs produced in the Drell-Yan process is arguably the most basic observable at hadron colliders.
Nevertheless, at small transverse momentum q_T, this distribution has many intriguing features which are the subject of my talk. They include a breaking of the naive factorization of the cross section by a collinear anomaly, the presence of large logarithms as well as a strong factorial divergence in its perturbative expansion, and the emergence of an intermediate scale which suppresses nonperturbative effects at very small transverse momentum