New features in version 10.3
- Calculation of Z production at NLO fixed-order through subtractions and resummation at the level of NLL. These calculations include the Z+jet process at NNLO using jettiness subtractions. Based on Ref.. Detailed documentation can be found in Section 11.
Jet veto resummation added for color singlet final states, achieving partial NLL accuracy, as described in Ref. . Vetoing energetic jet activity is a crucial tool for suppressing backgrounds and enabling new physics searches at the LHC, but the introduction of a veto scale can introduce large logarithms that may need to be resummed. We present an implementation of jet-veto resummation for color-singlet processes at the level of NLL matched to fixed-order NNLO predictions. Resummation is implemented for vetos of jet activity in productions of a single boson, such as , or , or of a pair of vector bosons, such as , or . The implementation relies on recent calculations of the soft and beam functions in the presence of a jet veto over all rapidities, with jets defined using a sequential recombination algorithm with jet radius . However one of the ingredients that is required to reach full NLL accuracy is only known approximately, hence NLL.