Commit d4c8f21a authored by Stefan Hoeche's avatar Stefan Hoeche
Browse files

documented c22574

parent e0a8389d
......@@ -63,6 +63,8 @@ if both c- and b-quarks are to be treated as massive.
@cindex CSS_EW_MODE
@cindex CSS_NOEM
@cindex CSS_MAXEM
@cindex CSS_MASS_THRESHOLD
@cindex CSS_EVOLUTION_SCHEME
Sherpa's default shower module is based on @mycite{Schumann2007mg}.
A new ordering parameter for initial state splitters was introduced
......@@ -94,3 +96,11 @@ other hand, forces the CS Shower to truncate its evolution at the
Nth emission. This setting, however does not necessarily compute all
Sudakov weights correctly. Both settings still enable the CS Shower
to be used in the METS scale setter, cf. @ref{SCALES}.
The evolution variable of the CS shower can be changed using
@option{CSS_EVOLUTION_SCHEME}. Two options are currently implemented,
which correspond to transverse momentum ordering (option 0) and modified
transverse momentum ordering (option 1). Additionally, the CS shower
allows to disable splittings at scales below the on-shell mass of heavy
quarks. The upper limit for the corresponding heavy quark mass is set
using @option{CSS_MASS_THRESHOLD}.
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