Fast Monte Carlos

Qsim

A Fast Monte Carlo is being developed to help us quickly extend our results to new models, and to help combined different results. The code libraries can be found on the alpha or challenge clusters.

The fast monte carlo consists of three pieces:

  1. FMC0 - A very fast SUSY four-vector generator which scans SUSY model space and makes a fast acceptance calculation for a series of user specified final state selections each with its own set of cuts. Documentation can be found here.
  2. TSIM+RSIM - Parametric trigger- and ID-efficiency simulators. Uses the fmc0 event common.
  3. QSIM - A parametric detector smearing and ID-efficiency program. Note that QSIM can be used as a stand-alone program, without the two above-mentioned programs,in a path with say ISAJET or PYTHIA and d0pjets (see the documentation for explicit instructions). It fills a common called qsim_commons.inc containing generated and smeared quantities for partons (jets, electrons, muons, and met). It also includes in the common blocks efficiencies for the partons to pass various common cuts, and variables like energy in a cone around the parton. The common blocks in qsim_commons.inc can be used to make column-wize ntuples The documentation on the QSIM libraries can be found here. A document comparing the output of RECO and QSIM can be found here.. This last also gives hints about how to properly link it up, what packages you must link in, etc.
Sarah C. Eno