Version 1.1.1 includes all bugfixes for previous versions as well as new ones.

Sherpa 1.1.1

Version 1.1.1 includes all bugfixes for previous versions as well as new ones (see Changelog below).

Download of Sherpa 1.1.1

The Sherpa package and a manual for getting started, can be downloaded here:

A Changelog for important differences between the previous version and this version is provided below.

:!: Please note that you still have to apply the patches provided below after unpacking the tarball.

Known problems/known bugs/FAQs

  • The compilation of Sherpa on Intel Mac computers may fail due to backtracing not being diabled correctly. Fix: Apply patch file via 'patch -p0 < intel_mac.patch' in the top level directory of your Sherpa installation and recompile with "TOOLS/makeinstall".
  • The TOOLS/update_datfiles script was missing in the release tarball. You can download it here: {{update_datfiles.sh}}.
  • Some incoming particles had the status 1 (active) instead of 2 (decayed) when underlying event was turned on (this should only cause problems if your analysis framework chokes on this). Fix: Apply patch file via 'patch -p0 < particles-status.patch' in the top level directory of your Sherpa installation and recompile with "TOOLS/makeinstall".
  • Runs with activated Underlying Event might stall with "WARNING in Phase_Space_Handler::WeightedEvent?() : too many trials". Fix: Apply patch file via 'patch -p0 < mpi-stall.patch' in the top level directory of your Sherpa installation and recompile with "TOOLS/makeinstall".

Changelog

User Interface changes

  • none

Bugfixes

  • Bugfix for overwriting of particle properties in BSM models.
  • Bugfix for "missing flavour" crash when initializing libraries with CKM matrix elements.
  • Bugfixes for all-in-one-file setup reading.
  • Bugfix for crash of underlying event with some PDFs from LHAPDF.
  • Bugfix in parton shower for non-CKKW setups (cures problems with 0 jet setups).
  • Bugfix in mass smearing of hadron decays (cures multiplicity problem in pp).
  • Some compile fixes for gcc 4.2
  • Adjust installation routine for non-standard LHAPDF installations, where the PDFsets are not located in $LHAPDFDIR/share/lhapdf/PDFsets, but somewhere else in $LHAPDFDIR.
  • Improvements in the TOOLS/update_datfiles script, which handles the update of dat-files written for 1.0.11.

New features

(no effect on standard processes, tested)

  • Add EPA spectrum for p -> p \gamma
  • Anomalous Z/photon couplings added
  • Update for effective MSSM-higgs gluon couplings; Lorentz structures for A0gg vertices

Remarks

For process declarations a specific ordering is needed:

  • For electron-photon collisions make sure the photon is on the first beam, bunch and parton!
  • For electron-proton collisions make sure the electron is on the first beam, bunch and parton!

A few non-standard setups are not working. Do not even try:

  • Parton shower in DIS--like situations, i.e. with only one incoming leg that showers.
  • Substructure of photons.
  • Laser backscattering beyond the region where CompAZ is valid (up to 500 GeV).