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148 lines
6.1 KiB
148 lines
6.1 KiB
\topheading{Native PDF sets}
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\label{olderPDFs}
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MCFM contains a native implementation of a number of PDF sets, such that
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the use of LHAPDF is not required. In this mode, one can choose from
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collection of parton distribution functions that are included with
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MCFM. The most recent distributions, together with their associated $\alpha_s(M_Z)$
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values, are given in \ref{pdlabelrecent}.
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Note that, due to the memory requirements for
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using the NNPDF sets, in OpenMP operation it is usually necessary to increase
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the value of the environment variable {\tt OMP\_STACKSIZE} to avoid
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segmentation faults.
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%
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\begin{table}[h]
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\begin{center}
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\begin{tabular}{|c|c|c|c|}
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\hline
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{\tt pdlabel} & $\alpha_s(M_Z)$ & order & reference \\
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\hline
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{\tt mstw8lo} & 0.1394 & 1 & \cite{Martin:2009iq} \\
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{\tt mstw8nl} & 0.1202 & 2 & \cite{Martin:2009iq} \\
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{\tt mstw8nn} & 0.1171 & 3 & \cite{Martin:2009iq} \\
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{\tt MMHT\_lo} & 0.135 & 1 & \cite{Harland-Lang:2014zoa} \\
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{\tt MMHT\_nl} & 0.120 & 2 & \cite{Harland-Lang:2014zoa} \\
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{\tt MMHT\_nn} & 0.118 & 3 & \cite{Harland-Lang:2014zoa} \\
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\hline
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{\tt CT10.00} & 0.118 & 2 & \cite{Lai:2010vv} \\
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{\tt CT14.LL} & 0.130 & 1 & \cite{Dulat:2015mca} \\
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{\tt CT14.NL} & 0.118 & 2 & \cite{Dulat:2015mca} \\
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{\tt CT14.NN} & 0.118 & 3 & \cite{Dulat:2015mca} \\
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{\tt CT14qed} & 0.118 & 2 & \cite{Schmidt:2015zda} \\
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\hline
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{\tt NN2.3NL} & 0.118 & 2 & \cite{Ball:2012cx} \\
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{\tt NN2.3NN} & 0.118 & 3 & \cite{Ball:2012cx} \\
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{\tt NN3.0LO} & 0.118 & 1 & \cite{Ball:2014uwa} \\
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{\tt NN3.0NL} & 0.118 & 2 & \cite{Ball:2014uwa} \\
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{\tt NN3.0NN} & 0.118 & 3 & \cite{Ball:2014uwa} \\
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\hline
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\end{tabular}
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\end{center}
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\caption{Modern PDF sets that are available in the code,
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their corresponding values of $\alpha_s(M_Z)$ and order of running,
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and a reference to the paper
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that describes their origin. Further sets, of a more historical nature, are listed in \ref{olderPDFs}.
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\label{pdlabelrecent}}
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\end{table}
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The availability of a number of historical PDF sets is retained in the code. These should
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typically not be used in modern analyses, but they may be helpful for comparison with
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older codes or in specialized cases.
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These distributions, together with their associated $\alpha_S(M_Z)$
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values, are given in Tables~\ref{pdlabelmrs} and~\ref{pdlabelcteq}.
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For the older distributions, where the
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coupling was specified by $\Lambda$ this requires
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some calculation and/or guesswork.
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\begin{table}[h]
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\begin{center}
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\begin{tabular}{|c|c|c||c|c|c|}
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\hline
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{\tt mrstqed} & 0.1205 & hep-ph/0411040 &
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{\tt mrs02nl} & 0.1197 & \mrstohtwo \\
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{\tt mrs02nn} & 0.1154 & \mrstohtwo &
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{\tt mrs4nf3} & 0.1083 & \mrstff \\
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{\tt mrs4lf3} & 0.1186 & \mrstff &
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{\tt mrs4nf4} & 0.1153 & \mrstff \\
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{\tt mrs4lf4} & 0.1251 & \mrstff &
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{\tt mrs0119} & 0.119 & \mrstohone \\
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{\tt mrs0117} & 0.117 & \mrstohone &
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{\tt mrs0121} & 0.121 & \mrstohone \\
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{\tt mrs01\_j} & 0.121 & \mrstohone &
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{\tt mrs01lo} & 0.130 & \mrstohtwofirst \\
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{\tt mrs99\_1} & 0.1175 & \mrsninenine &
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{\tt mrs99\_2} & 0.1175 & \mrsninenine \\
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{\tt mrs99\_3} & 0.1175 & \mrsninenine &
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{\tt mrs99\_4} & 0.1125 & \mrsninenine \\
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{\tt mrs99\_5} & 0.1225 & \mrsninenine &
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{\tt mrs99\_6} & 0.1178 & \mrsninenine \\
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{\tt mrs99\_7} & 0.1171 & \mrsninenine &
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{\tt mrs99\_8} & 0.1175 & \mrsninenine \\
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{\tt mrs99\_9} & 0.1175 & \mrsninenine &
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{\tt mrs9910} & 0.1175 & \mrsninenine \\
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{\tt mrs9911} & 0.1175 & \mrsninenine &
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{\tt mrs9912} & 0.1175 & \mrsninenine \\
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{\tt mrs98z1} & 0.1175 & \mrsnineeight &
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{\tt mrs98z2} & 0.1175 & \mrsnineeight \\
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{\tt mrs98z3} & 0.1175 & \mrsnineeight &
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{\tt mrs98z4} & 0.1125 & \mrsnineeight \\
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{\tt mtungb1} & 0.109 & \mrsnineeight &
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{\tt mrs98z5} & 0.1225 & \mrsnineeight \\
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{\tt mrs96r1} & 0.113 & \mrsninesix &
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{\tt mrs96r2} & 0.120 & \mrsninesix \\
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{\tt mrs96r3} & 0.113 & \mrsninesix &
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{\tt mrs96r4} & 0.120 & \mrsninesix \\
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{\tt mrs95ap} & 0.1127 & \mrsninefive &
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{\tt mrs95\_g} & 0.1148 & \mrsninefive \\
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{\tt hmrs90e} & 0.09838 & \hmrs &
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{\tt hmrs90b} & 0.10796 & \hmrs \\
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\hline
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\end{tabular}
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\end{center}
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\caption{Historical MRS-type pdf sets, their corresponding values of
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$\alpha_S(M_Z)$ and a reference to the paper or preprint that
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describes their origin.
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\label{pdlabelmrs}}
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\end{table}
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\begin{table}[h]
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\begin{center}
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\begin{tabular}{|c|c|c||c|c|c|}
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\hline
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& & &
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{\tt cteq66m} & 0.118 & \cteqsixsixm \\
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{\tt cteq61m} & 0.118 & \cteqsixonem &
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{\tt cteq6\_m} & 0.118 & \cteqsix \\
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{\tt cteq6\_d} & 0.118 & \cteqsix &
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{\tt cteq6\_l} & 0.118 & \cteqsix \\
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{\tt cteq6l1} & 0.130 & \cteqsix &
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{\tt cteq5hq} & 0.118 & \cteqfive \\
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{\tt cteq5f3} & 0.106 & \cteqfive &
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{\tt cteq5f4} & 0.112 & \cteqfive \\
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{\tt cteq5\_m} & 0.118 & \cteqfive &
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{\tt cteq5\_d} & 0.118 & \cteqfive \\
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{\tt cteq5\_l} & 0.127 & \cteqfive &
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{\tt cteq5l1} & 0.127 & \cteqfive \\
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{\tt cteq5hj} & 0.118 & \cteqfive &
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{\tt cteq5m1} & 0.118 & \cteqfive \\
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{\tt ctq5hq1} & 0.118 & \cteqfive &
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{\tt cteq4a5} & 0.122 & \cteqfour \\
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{\tt cteq4hj} & 0.116 & \cteqfour &
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{\tt cteq4lq} & 0.114 & \cteqfour \\
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{\tt cteq4\_m} & 0.116 & \cteqfour &
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{\tt cteq4\_d} & 0.116 & \cteqfour \\
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{\tt cteq4\_l} & 0.132 & \cteqfour &
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{\tt cteq4a1} & 0.110 & \cteqfour \\
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{\tt cteq4a2} & 0.113 & \cteqfour &
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{\tt cteq4a3} & 0.116 & \cteqfour \\
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{\tt cteq4a4} & 0.119 & \cteqfour &
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{\tt cteq3\_m} & 0.112 & \cteqthree \\
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{\tt cteq3\_l} & 0.112 & \cteqthree &
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{\tt cteq3\_d} & 0.112 & \cteqthree \\
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\hline
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\end{tabular}
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\end{center}
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\caption{Historical CTEQ-type pdf sets, their corresponding values of
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$\alpha_S(M_Z)$ and a reference to the paper or preprint that
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describes their origin.
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\label{pdlabelcteq}}
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\end{table}
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