\begin{longtable}{p{1.5cm}p{12cm}} \hline \multicolumn{1}{c}{{\textbf{Section} \texttt{general}}} & \multicolumn{1}{c}{{\textbf{Description}}} \\ \hline \texttt{nproc} & The process to be studied is given by choosing a process number, according to Tables in Section~\ref{MCFMprocs}. $f(p_i)$ denotes a generic partonic jet. Processes denoted as ``LO'' may only be calculated in the Born approximation. For photon processes, ``NLO+F'' signifies that the calculation may be performed both at NLO and also including the effects of photon fragmentation and experimental isolation. In contrast, ``NLO'' for a process involving photons means that no fragmentation contributions are included and isolation is performed according to the procedure of Frixione~\cite{Frixione:1998jh}. \\ \texttt{part} & The type of calculation to be performed. Possible values are given in Tables~\ref{tab:partchoicesfo} and~\ref{tab:partchoicesresum}. \\ \texttt{runstring} & When MCFM is run, it will write output to several files. The label {\tt runstring} will be included in the names of these files. \\ \texttt{rundir} & Directory for output and snapshot files \\ \texttt{sqrts} & Center of mass energy in GeV. \\ \texttt{ih1}, \texttt{ih2} & The identities of the incoming hadrons may be set with these parameters, allowing simulations for both $p{\bar p}$ (such as the Tevatron) and $pp$ (such as the LHC). Setting {\tt ih1} equal to ${\tt +1}$ corresponds to a proton, whilst ${\tt -1}$ corresponds to an anti-proton. \\ % Values greater than {\tt 1000d0} represent a nuclear collision, % as described in Section~\ref{sec:nucleus}. \\ \texttt{zerowidth} & When set to {\tt .true.} then all bosons are produced on-shell. This is appropriate for calculations of {\it total} cross-sections (such as when using {\tt removebr} equal to {\tt .true.}, below). When interested in decay products of the bosons this should be set to {\tt .false.}. \\ \texttt{removebr} & When set to {\tt .true.} the branching ratios are removed for unstable particles such as vector bosons or top quarks. See the process notes in Section~\ref{sec:specific}, or the process web-pages accessed via the \href{\mcfmprocs/proclist.html}{list of processes} for further details. \\ \texttt{ewcorr} & Specifies whether or not to compute EW corrections for the process. Default is {\tt none}. May be set to {\tt exact} or {\tt sudakov} for processes {\tt 31} (neutral-current DY), {\tt 157} (top-pair production) and {\tt 190} (di-jet production). For more details see section~\ref{subsec:EW}. \\ % {\texttt{vdecayid}}, {\texttt{v34id}}, {\texttt{v56id}} & % Flags to manually set the decays of vector bosons (34) and % (56) (experimental, not for general use). \\ \hline \end{longtable}