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30 lines
1.5 KiB
30 lines
1.5 KiB
\topheading{New features in version 10.3}
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\label{sec:10x3}
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\begin{itemize}
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\item
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Calculation of Z production at N$^3$LO fixed-order through $q_T$ subtractions and resummation at
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the level of N$^4$LL. These calculations include the Z+jet process at NNLO using jettiness
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subtractions. Based on Ref.\cite{Neumann:2022lft}. Detailed documentation can be found in
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Section~\ref{n3losec}.
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\item
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Jet veto resummation added for color singlet final states, achieving
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partial {\mbox{N$^3$LL}} accuracy, as described in Ref.~\cite{CENS}.
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Vetoing energetic jet activity is a crucial tool for suppressing
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backgrounds and enabling new physics searches at the LHC, but the
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introduction of a veto scale can introduce large logarithms that may
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need to be resummed. We present an implementation of jet-veto
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resummation for color-singlet processes at the level of N$^3$LL$_p$
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matched to fixed-order NNLO predictions. Resummation is
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implemented for vetos of jet activity in productions of a single
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boson, such as $Z/\gamma^*$, $W^\pm$ or $H$, or of a pair of vector
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bosons, such as $W^+W^-$, $W^\pm Z$ or $ZZ$. The implementation
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relies on recent calculations of the soft and beam functions in the
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presence of a jet veto over all rapidities, with jets defined using a
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sequential recombination algorithm with jet radius $R$. However one
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of the ingredients that is required to reach full {N$^3$LL} accuracy is
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only known approximately, hence N$^{3}$LL$_p$.
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Benchmark results, taken from Ref.~\cite{CENS}, are
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detailed in Section~\ref{jetvetosec}.
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\end{itemize}
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