Changes between Version 3 and Version 4 of WikiStart

Timestamp:

May 18, 2017, 5:08:07 PM (8 years ago)

Author:

graeme

Comment:

--

WikiStart

@@ -10 +10 @@
 This mode is selected by choosing `p p -> e+ e-` as your process in Herwig, and setting
 {{{
-set KrkNLO:Mode Z
+set KrkNLOEventReweight:Mode Z
 }}}
 
@@ -18 +18 @@
 This mode is selected by choosing `p p -> H` as your process in Herwig, and setting
 {{{
-set KrkNLO:Mode H
+set KrkNLOEventReweight:Mode H
 }}}
 as well as `read Matchbox/HiggsEffective.in`
@@ -28 +28 @@
 == Options
 === Scale Settings
-There are options that set the argument of AlphaS for the real emission correction, `KrkNLO:AS_R`, and the virtual+soft correction, `KrkNLO:AS_V`. The possible options are:
+There are options that set the argument of AlphaS for the real emission correction, `KrkNLOEventReweight:AS_R`, and the virtual+soft correction, `KrkNLOEventReweight:AS_V`. The possible options are:
   * AS_R: `Q2`, `M2`, `Freeze`
   * AS_V: `Q2`, `M2`
@@ -38 +38 @@
 
 === PDF Type
-TO BE DOCUMENTED
+The options available for the type of PDF are `MCDY`, and `MC` which refer to the type of MC-scheme PDF. These are selected via the interface `KrkNLOEventReweight:PDF`, as shown here
+{{{
+set KrkNLOEventReweight:PDF MC 
+}}}
 
+  Note::
+    The PDF type here '''must''' match the chosen PDF.
 
 == Using Monte Carlo scheme PDFs
 
-The MC-scheme PDFs are available in [https://krknlo.hepforge.org/hg/mc-pdf this repository], and are stored as  [https://lhapdf.hepforge.org LHAPDF] `.LHgrid` files.
+=== Obtaining the PDFs
+The MC-scheme PDFs are available in [https://krknlo.hepforge.org/hg/mc-pdf this repository], and are stored as [https://lhapdf.hepforge.org LHAPDF] `.LHgrid` files.
 
 The repository contains MC-scheme PDF, which are converted from their correspondingly named MSbar PDF, and are prefixed with either `MCDY_`,  or `MC_`, with the former denoting the ''Drell-Yan'' only variant  and the latter denoting the ''full'' conversion. 
@@ -55 +61 @@
 export LHAPATH=/path/to/mc-pdf:$LHAPATH
 }}}
+
+=== Setup
+To set the MC-scheme PDF in Herwig one can use the following snippet, replacing `MC_MMHT2014lo68cl.LHgrid` with the required MC-scheme PDF:
+{{{
+
+  cd /Herwig/Partons
+
+  set HardLOPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+  set HardNLOPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+
+  set ShowerLOPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+  set ShowerNLOPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+
+  set MPIPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+  set RemnantPDF:PDFName MC_MMHT2014lo68cl.LHgrid
+  
+}}}
+
+The file `$HERWIG_ENV/share/Matchbox/MMHT2014.in` can be used a a reference on how to set PDFs within Herwig.