+** fix for relocating MadGraph generated amplitudes
+ The directory and symbolic link structure for MadGraph-built amplitudes has
+ been changed to allow for relocation of a run directory to a different file
+ system hierarchy.
+
+** z* variable added to LeptonsJetsAnalysis
+ The builtin LeptonsJetsAnalysis has been extented to include the normalized
+ relative rapidity z*
+
+** fix to directory hierarchy
+ A bug in the Herwig-scratch directory hierarchy when integrating with
+ different seeds has been fixed.
+
+** detuning parameter for shower reweighting
+ An efficiency tweak when using the shower reweighting facilities has been
+ introduced for the veto algorithms in both the QTilde and the Dipole
+ shower. See the documentation for more details.
+
+** subprocess generation filters
+ A number of filters has been implemented to speed up process and diagram
+ generation for the case of Standard Model like processes; this is
+ particularly helpful for processes involving a large number of electroweak
+ combinatorics. See the documentation for more details.
+
* Herwig 7.0.2 release: 2016-04-29
** Event reweighting
- New option of calculating the weights for the effect of varying the scale used in both the default and dipole showers. This will be described in a forthcoming publication.
+ New option of calculating the weights for the effect of varying the scale
+ used in both the default and dipole showers. The method is described in
+ arXiv:1605.08256
** mergegrids mode
- A main mode for the Herwig executable has been added which merges the integration grids from parallel runs.
+ A main mode for the Herwig executable has been added which merges the
+ integration grids from parallel runs.
** NLO Diphoton production
- The NLO matrix elements in the POWHEG approach for diphoton production as described in JHEP 1202 (2012) 130, arXiv:1106.3939 have been included as MEPP2GammaGammaPowheg.
+ The NLO matrix elements in the POWHEG approach for diphoton production as
+ described in JHEP 1202 (2012) 130, arXiv:1106.3939 have been included as
+ MEPP2GammaGammaPowheg.
** BSM Hard process constructor
- A missing Feynman diagram with a t-channel vector boson has been added to the matrix element for vv2ss
+ A missing Feynman diagram with a t-channel vector boson has been added to
+ the matrix element for vv2ss
** BSM Decay Modes calculation
- The behaviour of the option to disable decay modes in BSM Models has been changed so that the partial width for the ignored modes is now calculated and included in the total width, but the branching ratio is set to zero. This is more physical than the previous option where the mode was totally ignored and hence not included in the calculation of the width.
+ The behaviour of the option to disable decay modes in BSM Models has been
+ changed so that the partial width for the ignored modes is now calculated
+ and included in the total width, but the branching ratio is set to
+ zero. This is more physical than the previous option where the mode was
+ totally ignored and hence not included in the calculation of the width.
** Mass Generation
- The behaviour of the GenericMassGenerator has been changed so that modes which have been disabled are only included in the calculation of the total width and not in the partial width used in the numerator of the weight used to select the off-shell mass.
+ The behaviour of the GenericMassGenerator has been changed so that modes
+ which have been disabled are only included in the calculation of the total
+ width and not in the partial width used in the numerator of the weight used
+ to select the off-shell mass.
** Boost detection
Boost could not detect the compiler version for gcc-5.3 and gcc-6.1
* Herwig 7.0.1 release: 2016-01-17
** Version number written to log file
The Herwig version number is now included in addition to ThePEG's version.
** Tau lifetimes
A bug with lifetimes for hard process Taus is fixed. Thanks to ATLAS
for the report!
** Shower FSR retries
Rare events could take a long time due to an extremely large number
of FSR retries. These are now capped at a configurable number.
** Dipole shower
Reweighting for non-radiating events; fixes for shower profile
handling; option to downgrade large-Q expansion for alphaS
** Matchbox builtins
Added massive currents for q-qbar
** ShowerAlphaQCD
can now use user-defined thresholds
** Input snippets
W/Z/H on-shell now split into three files; 4-flavour scheme added
** UFO converter
The converter now has experimental support for writing out param
cards of its current settings.
** LEPJetAnalysis loading fixed
** Contrib
HJets++ has moved to a stand-alone project, FxFx has been added