Speaker
Mikel Mendizabal
(DESY)
Description
The low transverse momentum, $q_{T}$, region of the Drell-Yan (DY) pair is dominated by non-perturbative physics. More precisely, the region where $q_{T}<<m_{DY}$. In approaches based in Collins-Soper-Stermann factorisation the non-perturbative region is treated with the Collins-Soper (CS) kernel. In the Parton Branching (PB) approach, based in the DGLAP evolution equation, the non-perturbative region arises from the large $z$ region, $z\leq$1, where $z$ is the momentum fraction of outgoing and incoming partons. Here, we present the non-perturbative Sudakov form factor in the PB approach and it's comparison with the CS kernel.
Authors
Hannes Jung
(DESY)
Mikel Mendizabal
(DESY)
