Sherpa Release 1.0.8

Sherpa 1.0.8

A number of things 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).

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!

Download of alpha version Sherpa-1.0.8

All Sherpa downloads can be found on HepForge

To run Sherpa with LHAPDF Version 3 you need to extract the LHAPDF grid archive into the SHERPA-1.0.8/Run directory. (The file size is 40 MB!)

In the download archive you can also download a short primer on how to get started and how to use Sherpa.

Known problems/known bugs/FAQs

  • Problem: The implementation of triple and quartic anomalous gauge couplings was partially incomplete and deficient.
    Fix: Apply patch file via patch -p0 < AGC.patch in the top level directory of your Sherpa installation.
  • Problem: We had a bug in the reweighting of Matrix Elements with the number of strong couplings not being equal to the number of strong particles - 2
    Fix: Apply patch file via patch -p0 < oqcd.patch in the top level directory of your Sherpa installation.
  • Problem: We had a bug in the Poincare class. This has screwed up some phi distributions to be non-uniform
    Fix: Apply patch file via patch -p0 < phi.patch in the top level directory of your Sherpa installation
  • Problem: We had an inconsistency in the decays routines for unstable tau-leptons or hadrons originating from other hadron decays
    Fix: Apply patch file via patch -p0 < tau.patch in the top level directory of your Sherpa installation.
  • Problem: Warning messages about empty bloblists in Hadron_Decays::Treat
    Fix: Apply patch file via patch -p0 < mi.patch in the top level directory of your Sherpa installation.

If you have questions regarding the installation or the usage of Sherpa, which are not answered by our Howto, please look around in this Wiki as well and post them in the [user:index user section], if they could be of general interest. Bug reports should go directly to the [team:].