Changes between Version 1 and Version 2 of WikiStart

Timestamp:

May 5, 2017, 4:36:03 PM (8 years ago)

Author:

graeme

Comment:

--

WikiStart

@@ -1 @@
-= Welcome to Trac 1.0.9 =
+= KrkNLO
 
-Trac is a '''minimalistic''' approach to '''web-based''' management of
-'''software projects'''. Its goal is to simplify effective tracking and handling of software issues, enhancements and overall progress.
+The KrkNLO method provides NLO QCD corrections to hard processes using LO parton-shower Monte Carlo events. It does so by making use of dedicated Monte Carlo (MC) scheme Parton Distribution Functions (PDFs) combined with a simple, postitive-definite, per-event kinematic weight.
 
-All aspects of Trac have been designed with the single goal to 
-'''help developers write great software''' while '''staying out of the way'''
-and imposing as little as possible on a team's established process and
-culture.
+== Supported Processes
 
-As all Wiki pages, this page is editable, this means that you can
-modify the contents of this page simply by using your
-web-browser. Simply click on the "Edit this page" link at the bottom
-of the page. WikiFormatting will give you a detailed description of
-available Wiki formatting commands.
+ === Drell-Yan
+The process `pp -> Z` is supported, and can be used together with the [wiki:MCDY MCDY], or [wiki:MC MC] PDFs.
 
-"[wiki:TracAdmin trac-admin] ''yourenvdir'' initenv" created
-a new Trac environment, containing a default set of wiki pages and some sample
-data. This newly created environment also contains 
-[wiki:TracGuide documentation] to help you get started with your project.
+This mode is selected by choosing `p p -> e+ e-` as your process in Herwig, and setting
+{{{
+set KrkNLO:Mode Z
+}}}
 
-You can use [wiki:TracAdmin trac-admin] to configure
-[http://trac.edgewall.org/ Trac] to better fit your project, especially in
-regard to ''components'', ''versions'' and ''milestones''. 
+=== Higgs production via Gluon Fusion
+The process `g g -> H` is supported and can used together with the [wiki:MC MC] PDFs. This is performed in the large top-mass limit.
+
+This mode is selected by choosing `p p -> H` as your process in Herwig, and setting
+{{{
+set KrkNLO:Mode H
+}}}
+as well as `read Matchbox/HiggsEffective.in`
+
+  Note::
+    the qq-initiated tree-level diagram must be added manually
 
 
-TracGuide is a good place to start.
+== 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:
+  AS_R::
+     `Q2`, `M2`, `Freeze`
+  AS_V::
+    `Q2`,`M2`
 
-Enjoy! [[BR]]
-''The Trac Team''
+The options correspond to:
+* `Q2` is the scale used in the shower (i.e. pT)
+* `M2` is the nominal mass of the boson (H/Z)
+* `Freeze` is Q2 below the mass M2, and fixed at M2 above
 
-== Starting Points ==
+=== PDF Type
+TO BE DOCUMENTED
 
- * TracGuide --  Built-in Documentation
- * [http://trac.edgewall.org/ The Trac project] -- Trac Open Source Project
- * [http://trac.edgewall.org/wiki/TracFaq Trac FAQ] -- Frequently Asked Questions
- * TracSupport --  Trac Support
 
-For a complete list of local wiki pages, see TitleIndex.
+== 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.
+
+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. 
+
+To download the MC-scheme PDFs run
+{{{
+hg clone https://krknlo.hepforge.org/hg/mc-pdf
+}}}
+and add the PDFs location to your LHAPDF environment path `LHAPATH` or `LHAPDF_DATA_PATH`. For example:
+{{{
+export LHAPATH=/path/to/mc-pdf:$LHAPATH
+}}}