Speaker
Vasily Sotnikov
(University of Zurich)
Description
We present the first NNLO-accurate event generation for $Z$ boson production in association with a bottom-quark pair. This is achieved by matching the NNLO calculation in the 4FS to a parton shower within the MiNNLO method, which we extend to accommodate the class of processes with a color singlet and a heavy-quark pair in the final state. We find that NNLO corrections to $Zb\bar{b}$ production are large and remarkably reduce the tension between 4FS predictions and $Z$+$b$-jet ATLAS and CMS measurements. The long-standing discrepancy between 4FS and 5FS predictions is therefore largely alleviated.
Primary authors
Vasily Sotnikov
(University of Zurich)
Javier Mazzitelli
(PSI)
Marius Wiesemann
(Max Planck Institute for Physics)
